Question about Samsung SGH-a777 Cell Phone

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Sim not allowed MM#3

AT&T samsung A-777 phone not working with my Go Phone sim card. I receive message "sim not allowed MM#3" after I turn on device.

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Phone not working with my Go Phone sim card. I receive message "sim not allowed MM#3" after I turn on device.

Posted on Jun 06, 2010


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Posted on Jan 02, 2017


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I need a free unlock code for my net 10 network so I can use my sim card & services on my Samsung Galaxy note 3 cell phone?

TracFone Wireless, Inc. Unlocking Policy TracFone is working with manufacturers of mobile wireless devices to pursue secure solutions which would allow for unlocking of devices without jeopardizing the security of those devices. TracFone will use commercially reasonable efforts to ensure that mobile wireless devices are capable of being unlocked domestically without compromising TracFone's ability to protect against unlawful distribution and use of such devices and without impeding TracFone's ability to protect its intellectual property. It will continue to keep the FCC apprised of these efforts on a quarterly basis. Once it achieves this capability with any given device, TracFone will permit its prepaid customers, upon request, to unlock such devices one year after initial activation, consistent with reasonable time, payment, or usage requirements. Currently, TracFone offers a Bring Your Own Phone program which enables consumers to utilize their own wireless devices, including unlocked devices, with TracFone's prepaid service.
1 In Cell Phone Unlock Codes CellphoneUnlocker com
Troubleshooting / SIM Card Q. What should I do if my phone displays "Enter PUK code"? A. The "Enter PUK code" message means that the SIM card is blocked. Please call our Customer Care Center at 1-877-TEN-CENT (1-877-836-2368) so that a representative can assist you with unlocking the SIM card. Q. What should I do if my phone displays "Insert SIM"? A. Please insert the SIM card into the back of your phone or make sure that the SIM card was properly inserted. Q. What should I do if my phone displays "SIM Card Rejected"? A. This message appears when a SIM card from another phone is used. Please make sure to insert the original NET10 SIM card included in the phone package. Q. What should I do if my phone displays "SIM Blocked"? A. The SIM Blocked message means you attempted to change the settings on the SIM card too many times. Please call our Customer Care Center at 1-877-TEN-CENT (1-877-836-2368) so that a representative can assist you with unblocking the SIM card. Q. Why does my phone display "No service" or "Unregistered SIM"? A. When your NET10 phone is turned on, you may receive this message because your phone has not yet been Activated. Disregard this message. It will disappear once your phone is active. Q. Why does my phone display "SIM card registration failed"? A. When your NET10 phone is turned on, you may receive the message "SIM card registration failed" because your phone has not yet been Activated. Disregard this message and clear the display by pressing the navigation key, which is the button below the display.

Jun 09, 2015 | Samsung Cell Phones

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T mobile note 4 Sim unlock code.

Unlocking a T-Mobile Android device is pretty easy and straightforward. Through the use of the Mobile Device Unlock App you can now unlock your phone with just one tap. Easy, fast, and convenient - UnlockBase can help you with all your mobile unlock needs.
Just make sure you go through the T-Mobile unlock requirements and policies:

Read more about A Complete Guide On How To SIM Unlock A T-Mobile Android Phone

Dec 24, 2014 | Cell Phones

1 Answer

The phone stops receiving text messages after its been on for several hours, i can send text messages all day long and they are received by the people i send then to. i can't get any messages back...

hey steven sc480 i experienced the same problem on the samsung a877 where the phone wont send anything. i finally learned after a while that the only solution to the problem is to restart it. its very annoying but u just have to accept it or upgrade to a new phone. the model i had which was the impression was notorious for its pink screen of death where the phone sends so many messages it just decides to turn the screen pink. but anyway i think that may be a relation in some of their phones. i know its annoying but i just got used to it. sorry

Aug 03, 2011 | Samsung SGH-a777 Cell Phone

1 Answer

I want to use my att sim card in the Tmobile phone model SGH T-239,it says wrong card. how do I unlock it so i can use the phone...pls. service provider is AT&T, I removed the sim from the...

Important: Stop if you receive an error message. The device may lock permanently if you enter the incorrect code multiple times.
  1. See if your phone is eligible to unlock: Mobile Wireless Device Unlocking.
  2. Contact Customer Care to request the Mobile Device Unlock code for your phone.
  3. Verify the IMEI by typing *#06#.
  4. Insert a Non-T-Mobile SIM & turn the phone on.
  5. The phone will automatically prompt you to enter the code into an empty field.
  6. Click/Tap in the empty field above the "Unlock & Dismiss" options (this will display a key pad on the screen).
  7. Input the unlock code provided by T-Mobile.
  8. Click/Tap Unlock.
  9. The phone will display Network Unlock Successful.

Feb 07, 2018 | Samsung SGH-t239 Cell Phone

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I have nokia n70 but i cannot received and sent text messages nor cannot make a call keep saying network busy. please help me this.


1. Turn the mobile phone off for a second and turn on, check if you have network signal. If still not working, try #2
2. Turn off the phone and remove the battery and sim from the phone for a couple of second. Return everything and turn on the phone. If still no network or no signal from you network provider, try #3
3. Turn off the phone and remove the battery and sim from the phone, insert the sim card to your other phone and check if you can make and receive calls and text messages.
4. Insert a your other sim card from your phone and check if you can do the same.

**With this, you can identify what needs to be repaired or replaced. (Sim card or Mobile Phone). If you cannot make and receive calls and text messages using no. 3 method, it is the sim card that has the problem and needs to be replaced. But if with #4, the phone has the problem and not the sim card. You need to contact your Service/Network Provider from technical help.

Thank you.

Aug 10, 2010 | Nokia N70 Cellular Phone

5 Answers


How to enter Unlocking Codes for LG Phones for Various U.S

Below are instructions that work for most network providers.

How to Unlock LG (most models):

1:Insert not-allowed SIM card
2:Power on the handset- phone will display “phone restricted”
3:Select “Cancel” - phone will display “phone restriction code”
4:Enter the SIM unlock code
5:Select “OK” - the handset is now successfully unlocked

How to Unlock LG KG245 (Vodafone Australia)

1:Insert a Vodafone Australia working SIM card.
2:Ensure the phone is charged and then switch the phone on.
3:Optional Step: If the SIM card has a PIN, enter your PIN number
4:Wait for the phone to power up then enter 2945#*7101#
5:Select Menu , then go to Settings > Security > SIM Lock > Network
6:Select Deactivate and enter the 8-digit unlocking code provide for your handset.
7:The handset will be unlocked automatically and will display “Done”. This will be confirmed if you can make and receive calls with the Non-Vodafone Australia SIM card. (You will need reception and phone credit with the different network provider)

How to Unlock LG KG800 or TG800 Chocolate:

1:With the phone in standby, enter 2945#*7101#. This will activate the extra menu.
2:Go to: Settings>Security>SimLock>Network

3:Select deactivate. Enter the unlock code,

How to Unlock LG C2000:

Insert non-Cingular SIM card

1:Power on the handset - phone will display “phone restricted”
2:Select “Cancel” - phone will display “phone restriction code”
3:Enter the SIM Unlock code
4:Select “OK” - the handset is now successfully unlocked

How to Enter Unlock Codes on LG F2250:

1:With allowed sim card in the start menu type: 2945#*3311#.

2:Handset shows saved, then return to startup screen
3:Press Menu key, choose Settings > Security > Sim Lock> Network eactivate, handset will now show ‘Enter NCK’
4:Enter your unlock code and OK.

How to Enter Unlock Codes on LG U8150:

1:Switch ON your phone with a not allowed SIM card.
2:Compose: 277634#*#.
3:Go to menu “SIM Lock”.
4:Enter the unlock code, which you can buy any online store .

How to Enter Unlock Codes on LG U8110:

1:With a not allowed sim card in your phone enter Pin code then validate, type: 277634#*#
2:Select ‘Sim Unlock’ menu #
3:Enter NCK code then validate
Your phone is now unlocked.

How to Enter Unlock Codes on LG U8210:

1:With a not allowed sim card enter Pin code then validate, type: 277634#*#
2:Shows test menu
3:Choose sim test menu and type: 2945#*#, choose Sim Unlock menu
4:Handset shows ‘Enter NCK’
5:Enter code, then hit OK.

How to Enter Unlock Codes on LG U81xx:

1:To bring up the unlock menu on the phone with a SIM card, type 2945#*88110#
2:Enter the code
In case you need to reset the phone without a SIM card first, type 277634#*# or 47328545454#.

How to Enter Unlock Codes on Cingular AT&T LG CU500:

1:Insert non-Cingular SIM card.
2:Power on the handset. Phone will display “Invalid SmartChip”
4:In Idle screen, enter 159753#*#. Phone will display “Enter NCK, Remaining 5
5:Enter the 8 digit SIM unlock code, which you can buy any Oline phones.
6:Select “OK”. The handset is now successfully unlocked

How to Enter Unlock Codes on all other LG cell phones:
Switch ON your phone with an allowed SIM card
Then compose:
2945#*5101# - (if you have a LG 510w)
1945#*5101# - (if you have a LG 1200 & B1200)
2945#*5221# - (if you have a LG 5200 & 52200)
2945#*5301# - (if you have a LG 5300)
2945#*5401# - (if you have a LG 5400)
2945#*70001# - (if you have a LG 7020)
2945#*7101# - (if you have a LG 7100)
2945#*1201# or 2945#*70001# - (if you have a LG 1100)
2945#*70001# - (if you have a LG7250T)
2945#*2201# - (if you have a LG C2200)
2945#*5301# - (if you have a LG T5100)
2945#*3311# - (if you have a LG C3310)
Go to “Menu” and then to “Settings”
Then select “Security”
To finish select “Network Provider” and select “Deactivate”
Enter the unlock code, which you can buy Online store unlock-cell-phones.

If your cell phone is not listed, please follow instructions for LG C2000 above

How to Enter Unlock Codes on all other LG U400 Shine (2 codes needed):

1:Insert the network SIM in the handset which works with the phone (from the locked carrier).
2:Enter 2945#*88110#.
3:The phone will then prompt ‘Unlock sim’. Press OK.
4:The phone will then prompt ‘Network Unlock’. Press OK.
5:The phone will then prompt- ‘Input Network Control Key’. Enter the 8 digit unlocking code. Press OK. If the unlocking code comes with only 7 digits, add a 0 in front of the 7 digit code. If the unlocking code comes with only 6 digits, add 00 in front of the 6 digit code. If you received a 16 digit code, enter it. The phone will have space for it.
6:It should give you the message: Success.
7:Come back to the main screen and Enter 2945#*88110#.
8:The phone will then prompt unlock sim. Press OK.
9:The phone will then prompt Network Unlock/ Lock but if you scroll down
10 :you will see a message Enter SP Lock. Enter SP Code.
Then press OK.

How to Enter Unlock Codes on all other LG KE970 Shine:

1:Switch ON your phone with an allowed SIM card
2:Then compose: 2945#*9701#
3:Press CALL.
4:It should you ask you for the code.

How to Enter Unlock Codes on all other LG TU720 Shine:

1:Put in a non-allowed SIM, phone says invalid SIM card
2:Now enter *#865625# then enter your 16 digits code.

How to Unlock LG KG800 Chocolate Without a Code (not reliable):

1:Insert SIM from the network that it is locked to.
2:Turn on phone.
3:On home Screen, slide up phone.
4:Type 2945#*#
5:ENG. Mode menu should appear.
6:Go Down to Factory Reset. Select it. May take a few minutes to reset!
7:This will reset the phone back to before the phone was locked to a network.
8:The phone will automatically restart (the network logo at start up will not change).
9:Now insert any SIM card and the phone should turn on normally
10:The phone is now unlocked and you can customize the setting as you like
How to Unlock LG Vu CU920
June 11th, 2008 by Eric

On the AT&T Network, to unlock the LG Vu or CU920, it’s pretty simple:
Put a AT&T or Cingular SIM in the phone; it does not have to be an active SIM
Enter *#865625# then the 16 digit unlock code*
Device should say: Network Lock Deactivated
Phone may automatically reboot

*The 16 digit code can be obtained by calling AT&T Technical Support and given the representative the IMEI number. In exchange they will give you the Subsidy Unlock Code.

Dec 05, 2009 | LG Vu CU920 Cellular Phone

1 Answer

I want to unlock my sim lock of d9001

Please follow these instructions very carefully.

1. Turn off your phone, put in a SIM of a provider that it is not
locked to, and turn it back on.

2. At the wrong card message, type *#9998*3323#.

i.e ( star/hash/9998/star/3323/hash )

A message will pop up telling you to press exit, Press exit.
Choose malloc fail.
Your phone will reboot and your SIM will work.

3. Type *0141# and then hit call.
This will give you a message saying your phone is personalized.

4. Power down your phone and insert a SIM card other than the one that is in it.

Power back up your phone.

5. At the SIM code prompt type 00000000, (that is 8 zeroes.)
Your phone should now be unlocked


In newer phones it is possible to use this alterative to above Simply type in keypad #*7337#) With no sim in phone
Can reset phone & unlock.
or ty this

1) Insert non Tmobile SIM (Such as a Cingular SIM)
2) Phone on. It will display wrong SIM
3) Enter *7465625*638*00000000*00000000# (The zeros will be dashes)
(Press End and the screen will clear)
4) Enter #7465625*638*00000000#
5) Reboot phone. Now you can use the Cingular SIM card .

Jun 13, 2009 | Samsung SGH-D900 Cellular Phone

2 Answers

I get an opening message: "SIM card registration failed" - what does this mean? then i can't receive nor send any msgs.

There are 3 causes of Sim Card Registration Failed, when you first turn on the phone, the sim card attempts to connect to the network if it can not do this it gives a message like Sim Card Registration failed.

1, The sim card is turned off, if you have had the sim card for a while and it hasnt been used they will turn it off, you need to contact them from another phone to get it turned on or get a new sim card.

2, The phone has a hardware reception problem, when it attempts to register itself with the network it can not... There is a reception problem and it requires repairs, this isnt really an easy diy job on this handset.

3, The phone is blocked, i.e reported lost or stolen. Some networks when a phone is reported will allow it to get reception but will not let it make calls, however other networks will not give it reception at all and hence you get a Sim Card Registration failed message.

I hope this helps, these are the causes of the message

May 08, 2009 | Nokia 6300 Cellular Phone

1 Answer

I have a Pantech Matrix. When I turn it on, I receive and error message. The message reads, "Smartchip not provisioned MM #2." And, when I attempt to make a call, I receive an "Emergency Call Only"...

I'm Currently using this phone. I had this problem also. Take to your and request for a new SIM Card, or you could try just removing the SIM card and re-inserting it.

Dec 25, 2008 | Pantech Matrix Cell Phone

1 Answer

Samsung SIM card issues!

you dont have to buy new sim...go to your nearest service senter. hardware failure.... sim sockets or sim ic... thats the problem...

Apr 08, 2008 | Samsung SYNC SGH-A707 Cellular Phone

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