Question about Sony Ericsson Cell Phones

1 Answer

Phone code for different SIM cards

Can work with only one SIM card, when I try to put another one it will ask a phone code that I don't remember it. I already reset the phone but problem couldn't solve.

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  • soufya91
    soufya91 Nov 09, 2012

    The code is security phone code(phone protection)

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  • Sony Ericsson Master
  • 32,281 Answers

Unlock Cell Phones
Your cell phone may be locked to a particular cell phone provider and in this case it needs to be unlocked to use with a different cell phone service provider. To get the security code/restriction code to unlock the cell phone from the current cell phone provider so you can use the SIM card with a different phone provider, Please click on this link and follow my instructions :- http://www.fixya.com/support/r4049238-unlock_cell_phone
If your phone provider does not help you then these WEB sites it provides security codes for a small price. http://www.mobileunlockstore.com/?gclid=CKDb2_y2558CFSlJagodxBkDHw http://www.mobileunlocksolutions.com/ http://www.superunlockcodes.com http://unlockcellphonecode.com/

Posted on Nov 10, 2012

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best thing to do is contact your Service Provider



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Posted on Jul 04, 2008

Joshi_Z
  • 567 Answers

SOURCE: can't remember password/code to unlock phonelock

hello there....well its quite simple...there is nothing wrong with your phone ...its your SIM... if it is asking for a PUK (Personal Unblocking Key) code...call your subscriber and ask them for PUK code,entering this code will reset your sim

If the error message is saying sim damaged call them and ask for a "sim replacement" you will get a new sim while you will retain the same number ,however you will lose the phone numbers and other data stored in sim,this can be free but it depends on the company and how 'customer friendly they are

Hope this help
Cheers

Posted on Aug 06, 2008

supernova278
  • 1932 Answers

SOURCE: Nokia N 70 - Error - 'Sim Card Rejected'

Hi,

IF you put PUK code many times depending on the model it wil lock the sim card. This is because to prevent unathorised person using your SIM card.

Default PIN code for nokia mobile is 0000
PUK code will be given by the service provider only.

Please call your service provider or go to service provider office,they will assist you in this issue.And they will have a security check like name,Phone number and other information to check weather the SIM card belongs to you only.Then they will assit you.

Thanx

Posted on Jul 23, 2010

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Can someone help my puk code has bkocked me from gettin in my phone i have four attempts left . i tried a different sim card it still wont work..


You need to unlock your phone. Either get the PUK code from T-Mobile or buy an unlock code for your phone online. Don't try any other codes, you don't want to get to 0 remaining tries. Without unlocking you can only use T-Mobile SIM cards.

Sep 14, 2012 | LG DoublePlay 4G Smartphone T-Mobile

2 Answers

Need the phone lock code for a nokia c3


Make the FixYa experience better for everyone by voting.

Hi,

My name is Ben and I'm your guru, i.e., a mentor, an influential teacher or popular expert: a management guru. - origin from Sanskrit, 'weighty, grave', for today.

Subject: How to unlock a cell phone

Customer's exact description: need the phone lock code for a nokia c3

Discussion: Problems of this type can be either Phone Locked, SIM card Locked, or Lost Password. Customer did not provide sufficient detail to narrow the problem such as country, service provider, etc..

Solution: Provide instructions on how to deal with all three possibilities.

There are two cell phone technologies that are used by the majority of the world's mobile phone service providers: Global System for Mobile communication (GSM) and Code Division Multiple Access (CDMA). If you have a CDMA phone, then your phone is not unlockable. End of story. However, if your phone operates on a GSM network, then it might be unlockable.

What's the difference? GSM phones use subscriber identity module (SIM) cards. A SIM card is a small card that's inserted into the phone. It contains all your contacts and settings, and it's linked to your account. You can take the SIM card out, put it into another phone, and if someone calls your number, the new phone will ring. You can also put a different SIM card in your unlocked phone, and your phone will then work with whatever phone number and account is linked to that card. CDMA phones have no SIM cards and must be authenticated by the service provider, which makes unlocking a phone impossible.

If a phone is locked, the service provider has installed some software on the phone that ties the subscriber ID number on the SIM card to the serial number of that particular phone. If the SIM card and phone serial number don't match, the phone simply won't work. The SIM card won't work in other phones, and the phone won't work with other SIM cards.

If you live in North America, you can usually determine whether your phone is GSM or CDMA based on the service provider you use. T-Mobile and AT&T use GSM, while Verizon and Sprint use CDMA. In Europe, almost all phones are GSM.

How can you tell if your phone is already unlocked? In Europe, unlocked phones are more common. In fact, many countries have cell phone portability laws that make it illegal for a company to lock a phone to a specific account (though these laws seem to change frequently). In North America, fewer phones are sold unlocked. If you received a phone for free or at a very low price when you signed a contract for your cell phone service, your phone is almost certainly locked.

There's an easy way to find out for sure: Find a friend whose phone is known to be unlocked. Have your friend place his or her SIM card in your phone, and then call your friend's number. If your phone rings, you know your phone is unlocked. If your phone simply generates an error message, then it's locked.

Problem areas: The question most honest people ask me is, "Is it legal to unlock a cell phone?" In Europe, the answer is generally yes. Though laws differ from country to country, they tend to favor consumers over companies. In the United States, the answer is also yes. The U.S. Copyright Office issues rulings every three years, and in 2006, they declared that unlocking a cell phone does not infringe on the copyright of the phone manufacturer or service provider, and therefore isn't prohibited.
In order to provide the customer with precise information, one must have the following information.

• Phone description including the make and model.
• The name of the subscriber's carrier (a.k.a. service provider).
• Information as to whether it is the phone or the SIM that is locked.


Possible solutions: The process of unlocking a phone is actually quite simple, and doesn't require any technical knowledge. There are three accepted methods for accomplishing the unlocking. For some phones, you just have to enter a numeric code into the phone. For a fee, some service providers will even give you the proper unlock code for your phone. There are also third party companies that provide cell phone unlock codes for a fee that ranges from $5 to about $25, depending on the model of phone you have.

There is a very high probability that your carrier will unlock your phone at one of its retail outlets. Manufacturers provide their customers (AT&T, Verizon, Nextel, etc.) with the unlock codes. However, if you - the ultimate consumer - write to Sony-Ericsson, LG, Motorola, Nokia, etc. and request an unlock code, that request will be refused. However, be forewarned that some service providers will charge you a fee for unlocking your phone.

Secondly, you can unlock your phone on your own. For some phones, you just have to enter a numeric code into the phone. I don't hand out these numbers because they vary from company-to-company and usually don't work, But if you have the patience, there are several instructional videos on www.youtube.com that provide some useful data. However, I don't recommend them because most of these videos are only free to look at. Yes they are trying to sell you something, like their service.

CNET has several pieces of free software that claim to unlock phones. Click on the following link and perhaps you can find something of interest. Nokia Free Unlock Codes Calculator

Lastly, for a fee, there are third-party companies that provide cell phone unlock codes at a cost that ranges from $5 to about $25, depending on the model of phone you have. The only company that I recommend is Freedom Unlock and the fee for most popular phones is about Five (5.00) USD. I have no interest in this company and my only contact has been in researching their website.

PUK Codes

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from AT&T to unlock your SIM card.

Since I don't know the name of your carrier, I'm using AT&T as an example. Most carriers use the same methodology though the wording may be different.

You can obtain your phone's PUK code from AT&T in one of these ways:

• Log in to myAT&T online
• Use our Technical Support Chat.
• Contact Customer Care


To get your phone's PUK code online:

? Log in to myAT&T.
? From the myAT&T tab at the top of the page, hover over the Wireless link and select Phone/Device under the My Wireless Service heading.
? From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.
? The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator."

Although most people remember their primary SIM PIN code, those other codes - used for various verification purposes - are never to be found when needed. Below I've included a set of short codes which, when entered on a handset's standby screen, will let you easily change PIN and PUK (short for Pin Unlock Code) codes - but keep in mind, they may not work with all handsets and mobile operators.

More importantly, when changing one's PUK codes there'll be no help to get from the mobile operator if the new codes are forgotten, so make sure to write any changes down alongside the old PUK codes.

WARNING! The following methodology does not work for every phone. Perhaps you'll be lucky. Also, please note that the codes should be entered without the spaces shown below.

Change SIM Card PIN
** 04 * old PIN * new PIN * new PIN #

Change SIM Card PIN 2 (Write down the new code)
** 042 * old PIN * new PIN * new PIN #

Change SIM Card PUK (Write down the new code)
** 05 * old PUK * new PUK * new PUK #

Change SIM Card PUK 2 (Write down the new code)
** 052 * old PUK * new PUK * new PUK #

Display Handset IMEI
*# 06 #

This was wordy but hopefully it helped you.

Ben

Oct 22, 2011 | Nokia C3 Cell Phone

1 Answer

I need pin code to unlock my reliance sim plz help... My Reliance sim number is 8991091520000378504 ..


Make the FixYa experience better for everyone by voting.

Hi,

My name is Ben and I'm your guru, i.e., mentor, an influential teacher or popular expert: a management guru. - origin from Sanskrit, 'weighty, grave', for today.

Problem areas: The question most honest people ask me is, "Is it legal to unlock a cell phone?" In Europe, the answer is generally yes. Though laws differ from country to country, they tend to favor consumers over companies. In the United States, the answer is also yes. The U.S. Copyright Office issues rulings every three years, and in 2006, they declared that unlocking a cell phone does not infringe on the copyright of the phone manufacturer or service provider, and therefore isn't prohibited.

In order to provide the customer with precise information, one must have the following information.

• Phone description including the make and model.
• The name of the subscriber's carrier (a.k.a. service provider).
• Information as to whether it is the phone or the SIM that is locked.

Possible solution: You can unlock your phone on your own. For some phones, you just have to enter a numeric code into the phone. I don't hand out these numbers because they vary from company-to-company and usually don't work, But if you have the patience, there are several instructional videos on www.youtube.com that provide some useful data. However, I don't recommend them because most of these videos are only free to look at. Yes they are trying to sell you something, like their service.

PUK Codes

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from AT&T to unlock your SIM card.

Since I don't know the name of you carrier, I'm using AT&T as an example. Most carriers use the same methodology though the wording may be different. (This is the easiest solution)

You can obtain your phone's PUK code from AT&T in one of these ways:

• Log in to myAT&T online
• Use our Technical Support Chat.
• Contact Customer Care


To get your phone's PUK code online:

? Log in to myAT&T.
? From the myAT&T tab at the top of the page, hover over the Wireless link and select Phone/Device under the My Wireless Service heading.
? From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.
? The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator."

You can also do it without any assistance from anyone. However, be sure to read the following carefully because there are pitfalls. If you want to try to do it yourself, just click on the following link:
Universal Software Solution for Unlocking a SIM Card

Although most people remember their primary SIM PIN code, those other codes - used for various verification purposes - are never to be found when needed. Below I've included a set of short codes which, when entered on a handset's standby screen, will let you easily change PIN and PUK (short for Pin Unlock Code) codes - but keep in mind, they may not work with all handsets and mobile operators.

More importantly, when changing one's PUK codes there'll be no help to get from the mobile operator if the new codes are forgotten, so make sure to write any changes down alongside the old PUK codes.

The following methodology does not work for every phone. Perhaps you'll be lucky. Also, please note that the codes should be entered without the spaces shown below.

Change SIM Card PIN
** 04 * old PIN * new PIN * new PIN #

Change SIM Card PIN 2 (Write down the new code)
** 042 * old PIN * new PIN * new PIN #

Change SIM Card PUK (Write down the new code)
** 05 * old PUK * new PUK * new PUK #

Change SIM Card PUK 2 (Write down the new code)
** 052 * old PUK * new PUK * new PUK #

Display Handset IMEI
*# 06 #

This was wordy but hopefully it helped you.

Ben

Sep 16, 2011 | Cell Phones

1 Answer

I have a Cingular Pink Razr that I am trying to put a tmobile sim card in and it is asking for the subsidy password and I have nooo clue what that is...I really don't want to pay to get it so if there...


Make the FixYa experience better for everyone by voting.

Hi,

My name is Ben and I'm your guru, i.e., mentor, an influential teacher or popular expert: a management guru. - origin from Sanskrit, 'weighty, grave' for today.

Subject: How to unlock a cell phone

Customer's exact description: I have a Cingular Pink Razr that I am trying to put a tmobile sim card in and it is asking for the subsidy password and I have nooo clue what that is...I really don't want to pay to get it so if there is anyone who knows how to get past it, It would be much appreciated thanks! email:tlay13@gmail.com

Discussion: Problems of this type can be either Phone Locked, SIM card Locked, or Lost
Password. Customer did not provide sufficient detail to narrow the problem. The provisions of my FixYa contract forbid all contacts outside of the FixYa website.

Solution: Provide instructions on how to deal with all three possibilities.

Option 1
.

If a phone is locked, the service provider has installed some software on the phone that ties the subscriber ID number on the SIM card to the serial number of that particular phone. If the SIM card and phone serial number don't match, the phone simply won't work. The SIM card won't work in other phones, and the phone won't work with other SIM cards.

If you live in North America, you can usually determine whether your phone is GSM or CDMA based on the service provider you use. T-Mobile and AT&T use GSM, while Verizon and Sprint use CDMA. In Europe, almost all phones are GSM.

How can you tell if your phone is already unlocked? In Europe, unlocked phones are more common. In fact, many countries have cell phone portability laws that make it illegal for a company to lock a phone to a specific account (though these laws seem to change frequently). In North America, fewer phones are sold unlocked. If you received a phone for free or at a very low price when you signed a contract for your cell phone service, your phone is almost certainly locked.

There's an easy way to find out for sure: Find a friend whose phone is known to be unlocked. Have your friend place his or her SIM card in your phone, and then call your friend's number. If your phone rings, you know your phone is unlocked. If your phone simply generates an error message, then it's locked.

Problem areas: The question most honest people ask me is, "Is it legal to unlock a cell phone?" In Europe, the answer is generally yes. Though laws differ from country to country, they tend to favor consumers over companies. In the United States, the answer is also yes. The U.S. Copyright Office issues rulings every three years, and in 2006, they declared that unlocking a cell phone does not infringe on the copyright of the phone manufacturer or service provider, and therefore isn't prohibited.
In order to provide the customer with precise information, one must have the following information.

• Phone description including the make and model.
• The name of the subscriber's carrier (a.k.a. service provider).
• Information as to whether it is the phone or the SIM that is locked.


Option 2

The process of unlocking a phone is actually quite simple, and doesn't require any technical knowledge. There are three accepted methods for accomplishing the unlocking. For some phones, you just have to enter a numeric code into the phone. For a fee, some service providers will even give you the proper unlock code for your phone. There are also third party companies that provide cell phone unlock codes for a fee that ranges from $5 to about $25, depending on the model of phone you have.

There is a very high probability that your carrier will unlock your phone at one of its retail outlets. Manufacturers provide their customers (AT&T, Verizon, Nextel, etc.) with the unlock codes. However, if you - the ultimate consumer - write to Sony-Ericsson, LG, Motorola, Nokia, etc. and request an unlock code, that request will be refused. However, be forewarned that some service providers will charge you a fee for unlocking your phone.

Secondly, you can unlock your phone on your own. For some phones, you just have to enter a numeric code into the phone. I don't hand out these numbers because they vary from company-to-company and usually don't work, But if you have the patience, there are several instructional videos on www.youtube.com that provide some useful data. However, I don't recommend them because most of these videos are only free to look at. Yes they are trying to sell you something, like their service.

Lastly, for a fee, there are third party companies that provide cell phone unlock codes at a cost that ranges from $5 to about $25, depending on the model of phone you have. The only company that I recommend is Freedom Unlock and the fee for most popular phones is about Five (5.00) USD. I have no interest in this company and my only contact has been in researching their website.

PUK Codes

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from AT&T (Substitute your carrier's name) to unlock your SIM card.

Since I don't know the name of you carrier, I'm using AT&T as an example. Most carriers use the same methodology though the wording may be different.

You can obtain your phone's PUK code from AT&T in one of these ways:

• Log in to myAT&T online
• Use our Technical Support Chat.
• Contact Customer Care


To get your phone's PUK code online:

? Log in to myAT&T.
? From the myAT&T tab at the top of the page, hover over the Wireless link and select Phone/Device under the My Wireless Service heading.
? From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.
? The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator."

You can also do it without any assistance from anyone. However, be sure to read the following carefully because there are pitfalls. If you want to try to do it yourself, just click on the following link:
Universal Software Solution for Unlocking a SIM Card

Although most people remember their primary SIM PIN code, those other codes - used for various verification purposes - are never to be found when needed. Below I've included a set of short codes which, when entered on a handset's standby screen, will let you easily change PIN and PUK (short for Pin Unlock Code) codes - but keep in mind, they may not work with all handsets and mobile operators.

More importantly, when changing one's PUK codes there'll be no help to get from the mobile operator if the new codes are forgotten, so make sure to write any changes down alongside the old PUK codes.

The following methodology does not work for every phone. Perhaps you'll be lucky. Also, please note that the codes should be entered without the spaces shown below.

Change SIM Card PIN
** 04 * old PIN * new PIN * new PIN #

Change SIM Card PIN 2 (Write down the new code)
** 042 * old PIN * new PIN * new PIN #

Change SIM Card PUK (Write down the new code)
** 05 * old PUK * new PUK * new PUK #

Change SIM Card PUK 2 (Write down the new code)
** 052 * old PUK * new PUK * new PUK #

Display Handset IMEI
*# 06 #

This was wordy but hopefully it helped you.

Ben

Sep 12, 2011 | Cell Phones

1 Answer

I'm having a problem with my Samsung SGH-a927. I just wanted to put in a PIN code but then it also asked me for another code in which I failed 4 times and now it's asking me for a PUK code. Is...


Make the FixYa experience better for everyone by voting.

Hi,

My name is Ben and I'm your guru, i.e., mentor, an influential teacher or popular expert: a management guru. - origin from Sanskrit, 'weighty, grave' for today.


As you evaluate my advise.solutions and suggestions, there are a few things you must keep in mind:

• I did not diagnose your problem and am therefore only able to evaluate what you tell me. For example, if you ask me a fuse location, that doesn't mean that I can tell you the reason why the fuse blew. Keep in mind that I'm limited in my analysis to what you tell me.
• A thorough diagnostic approach involves the use of technical equipment, such as voltage meters. scanning equipment and other sophisticated devices.
• Lastly, fixing one problem can very easily reveal a problem with something that you might consider unrelated. If that happens, you might want to view me as being incompetent.

Subject: How to unlock a SIM card

Customer's exact description: I'm having a problem with my Samsung SGH-a927. I just wanted to put in a PIN code but then it also asked me for another code in which I failed 4 times and now it's asking me for a PUK code. Is there any way I can get the code without calling Customer Service.

Discussion: Problems of this type can be easily solved and the short answer is YES. However, since I don't know the name of your carrier, I'll give you the various solutions including contacting customer service.

Solution: Provide instructions on how to deal with all three possibilities.


PUK Codes

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from AT&T to unlock your SIM card.

Since I don't know the name of you carrier, I'm using AT&T as an example. Most carriers use the same methodology though the wording may be different.

You can obtain your phone's PUK code from AT&T in one of these ways:

Take the phone into your carrier's retail outlet.

OR

• Log in to myAT&T online
• Use our Technical Support Chat.
• Contact Customer Care


To get your phone's PUK code online:

? Log in to myAT&T.
? From the myAT&T tab at the top of the page, hover over the Wireless link and select Phone/Device under the My Wireless Service heading.
? From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.
? The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator."

You can also do it without any assistance from anyone. However, be sure to read the following carefully because there are pitfalls. If you want to try to do it yourself, just click on the following link:
Universal Software Solution for Unlocking a SIM Card

Lastly . . . .

Although most people remember their primary SIM PIN code, those other codes - used for various verification purposes - are never to be found when needed. Below I've included a set of short codes which, when entered on a handset's standby screen, will let you easily change PIN and PUK (short for Pin Unlock Code) codes - but keep in mind, they may not work with all handsets and mobile operators.

More importantly, when changing one's PUK codes there'll be no help to get from the mobile operator if the new codes are forgotten, so make sure to write any changes down alongside the old PUK codes.

The following methodology does not work for every phone. Perhaps you'll be lucky. Also, please note that the codes should be entered without the spaces shown below.

Change SIM Card PIN
** 04 * old PIN * new PIN * new PIN #

Change SIM Card PIN 2 (Write down the new code)
** 042 * old PIN * new PIN * new PIN #

Change SIM Card PUK (Write down the new code)
** 05 * old PUK * new PUK * new PUK #

Change SIM Card PUK 2 (Write down the new code)
** 052 * old PUK * new PUK * new PUK #

Display Handset IMEI
*# 06 #

This was wordy but hopefully it helped you.

Ben

Aug 31, 2011 | Cell Phones

1 Answer

I have a nokia 7373 and have entered a wrong security code too many times now even if i do the right code it says security code error.


Make the FixYa experience better for everyone by voting.

Hi,

My name is Ben and I'm your guru, i.e., mentor, an influential teacher or popular expert: a management guru. - origin from Sanskrit, 'weighty, grave'.for today. WOW!

As you evaluate my advise and suggestions, there are a few things you must keep in mind:

• I did not diagnose your problem and am therefore only able to evaluate what you tell me. For example, if you ask me a fuse location, that doesn't mean that I can tell you the reason why the fuse blew.
• A thorough diagnostic approach involves the use of technical equipment, xuch as voltage meters. scanning equipment and other sophisticated devices.
• Lastly, fixing one problem can very easily reveal a problem with something that you might consider unrelated. If that happens, you might want to view me as being incompetent.

Subject: Unlock a cell phone or finding a new PUK code

Customer's exact description: i have a nokia 7373 and have entered a wrong security code too many times now even if i do the right code it says security code error.

Evaluation: The customer needs either to unlock the phone or the SIM card,

My Solution: Provide information for a locked phone and (2) a locked SIM card

First; A locked phone, If your phone is unlocked proceed to the PUK section that follows the locked phone discussion.

Discussion: There are two cell phone technologies that are used by the majority of the world's mobile phone service providers: Global System for Mobile communication (GSM) and Code Division Multiple Access (CDMA). If you have a CDMA phone, then your phone is not unlockable. End of story. However, if your phone operates on a GSM network, then it might be unlockable.

What's the difference? GSM phones use subscriber identity module (SIM) cards. A SIM card is a small card that's inserted into the phone. It contains all your contacts and settings, and it's linked to your account. You can take the SIM card out, put it into another phone, and if someone calls your number, the new phone will ring. You can also put a different SIM card in your unlocked phone, and your phone will then work with whatever phone number and account is linked to that card. CDMA phones have no SIM cards and must be authenticated by the service provider, which makes unlocking a phone impossible.

If a phone is locked, the service provider has installed some software on the phone that ties the subscriber ID number on the SIM card to the serial number of that particular phone. If the SIM card and phone serial number don't match, the phone simply won't work. The SIM card won't work in other phones, and the phone won't work with other SIM cards.

If you live in North America, you can usually determine whether your phone is GSM or CDMA based on the service provider you use. T-Mobile and AT&T use GSM, while Verizon and Sprint use CDMA. In Europe, almost all phones are GSM.

How can you tell if your phone is already unlocked? In Europe, unlocked phones are more common. In fact, many countries have cell phone portability laws that make it illegal for a company to lock a phone to a specific account (though these laws seem to change frequently). In North America, fewer phones are sold unlocked. If you received a phone for free or at a very low price when you signed a contract for your cell phone service, your phone is almost certainly locked.

There's an easy way to find out for sure: Find a friend whose phone is known to be unlocked. Have your friend place his or her SIM card in your phone, and then call your friend's number. If your phone rings, you know your phone is unlocked. If your phone simply generates an error message, then it's locked.

Problem areas: The question most honest people ask me is, "Is it legal to unlock a cell phone?" In Europe, the answer is generally yes. Though laws differ from country to country, they tend to favor consumers over companies. In the United States, the answer is also yes. The U.S. Copyright Office issues rulings every three years, and in 2006, they declared that unlocking a cell phone does not infringe on the copyright of the phone manufacturer or service provider, and therefore isn't prohibited.
In order to provide the customer with precise information, one must have the following information.

• Phone description including the make and model.
• The name of the subscriber's carrier (aka service provider).
• Information as to whether it is the phone or the SIM that is locked.


Possible solutions: The process of unlocking a phone is actually quite simple, and doesn't require any technical knowledge. There are three accepted methods for accomplishing the unlocking. For some phones, you just have to enter a numeric code into the phone. For a fee, some service providers will even give you the proper unlock code for your phone. There are also third party companies that provide cell phone unlock codes for a fee that ranges from $5 to about $25, depending on the model of phone you have.

There is a very high probability that your carrier will unlock your phone at one of its retail outlets. Manufacturers provide their customers (AT&T, Verizon, Nextel, etc.) with the unlock codes. However, if you - the ultimate consumer - write to Sony-Ericsson, LG, Motorola, Nokia, etc. and request an unlock code, that request will be refused. However, be forewarned that some service providers will charge you a fee for unlocking your phone.

Secondly, you can unlock your phone on your own. For some phones, you just have to enter a numeric code into the phone. I don't hand out these numbers because they vary from company-to-company and usually don't work, But if you have the patience, there are several instructional videos on www.youtube.com that provide some useful data. However, I don't recommend them because most of these videos are trying to sell you something.

Lastly, for a fee, there are third party companies that provide cell phone unlock codes at a cost that ranges from $5 to about $25, depending on the model of phone you have. The only company that I recommend is Freedom Unlock and the fee for most popular phones is about Five (5.00) USD. I have no interest in this company and my only contact has been in researching their website.

PUK Codes

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from AT&T to unlock your SIM card.

Since I don't know the name of you carrier, I'm using AT&T as an example. Most carriers use the same methodology though the wording may be different.

You can obtain your phone's PUK code from AT&T in one of these ways:

• Log in to myAT&T online
• Use our Technical Support Chat.
• Contact Customer Care


To get your phone's PUK code online:

? Log in to myAT&T.
? From the myAT&T tab at the top of the page, hover over the Wireless link and select Phone/Device under the My Wireless Service heading.
? From the My Phone/Device screen, select the Unblock SIM Card link under the My Make & Model heading.
? The Unblock SIM screen will display your PUK code and will give you instructions for unblocking your SIM Card.



Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator."

This is probably more than you wanted to know, but hopefully it solved your problem,

Ben

Aug 12, 2011 | Nokia 7373 Cellular Phone

1 Answer

I locked myself out of my phone and its asking for the PUK code and i dont know the PUK code.


The PUK code is provided by the service provider. Don't try to enter the wrong PUK. It will block the SIM card. So you have to do one thing. Switch off your mobile and remove the SIM card from your mobile.You can see 19 digit number in your SIM card. Please note it down. After that plz refix your SIM card and switch it on. Then you plz call your service provider from other mobile (it should be same network) and ask for PUK. They will provide PUK code when you give that 19 digit number. You can enter that PUK to your phone.

Thanks & Regards
Anas K A



Apr 22, 2011 | Cell Phones

2 Answers

I put the wrong password in and my sim locked up


U NEED TO CONTACT UR SERVICE PROVIDER AS THE SIM CARD HAS BEEN BLOCKED AND NEED TO BE REPLACE WITH NEW ONE

Dec 15, 2010 | LG Xenon GR500 Cell Phone

1 Answer

Nokia N 70 - Error - 'Sim Card Rejected'


Hi,

IF you put PUK code many times depending on the model it wil lock the sim card. This is because to prevent unathorised person using your SIM card.

Default PIN code for nokia mobile is 0000
PUK code will be given by the service provider only.

Please call your service provider or go to service provider office,they will assist you in this issue.And they will have a security check like name,Phone number and other information to check weather the SIM card belongs to you only.Then they will assit you.

Thanx

Jul 23, 2010 | Nokia N70 Cellular Phone

2 Answers

Lg xenon "insert SIM" :( PLZ HELP


Dear dont panic , please try the below options
1.Try resetting the phone settings by removing memory card
2.Try with a different battery (Most of the times the battery leads creates problems)
3.Please try with a different sim card
If no resolved get in touch on techzoneindiabng@mail.com

Feb 18, 2010 | LG Xenon GR500 Cell Phone

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