I have AT&T and I am using a t-mobile phone i accidently locked my SIM card and it wont let me unlock it and i dont know what to do

The lock does not appear to be on the phone as the old SIM works. The lock is in the new SIM. You have to call the phone company or if you have the PUK code for the SIM you can go to the phone company's website and check how you can unlock the SIM card.

I think your mobile is not unlocked properly. Choose a reliable service to unlock otherwise you'll have to come across problems like this and spend lot more money to solve the issue. A good source to unlock your Samsung sgh-x830 is Mobile-Unlocker.com which unlocks mobiles using codes. Unlocking using codes is the simplest method to unlock mobiles. Visit the website to get the unlock code.

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Hi,

Let me give you a little background and then some solutions. This is generic because I don't know your carrier. I'm useing ATT as an example.

Phones are naturally unlocked, but a service provider might lock them

When originally manufactured, all GSM cell phones are unlocked. That is, they can be used with any SIM from any cellphone service provider - always assuming, of course, that the cellphone service provider has compatible GSM service on the same frequency bands that the phone can operate on.

Most cell phone service providers electronically 'lock' the phone so that it can only be used with their service. There are obvious reasons why they choose to do this - in particular, to force you to pay what are usually very high roaming charges when you take your phone out of their network and use it elsewhere in the world.

Fortunately, this locking is reversible. With some phones, it is possible to simply enter an unlocking password code into the phone and it is immediately then unlocked. Other phones need to be connected up to a special unlocking data terminal.

Your phone has to be unlocked by the carrier. LG, Motorala, Sony Ericsson, Nokia and most of their ilk, will not give consumers the unlock codes but don't despair.

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 your carrier. For example, if you have AT&T to unlock your SIM card, you can obtain your phone's PUK code from AT&T by:

● logging in to your myWireless Account online
● using their Technical Support Chat
● calling Customer Care at 1-800-331-0500

To get your phone's PUK code online from ATT:

● Log in to your myWireless Account.
● Select My Services under My Account.
● From the My Services screen, select My Phone/Device.
● Select Unblock SIM Card.
● The Unblock SIM screen will display your PUK code.


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 ATT 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."

There are three other ways to unlock a phone:

● The carrier will unlock the phone for you at one of its retail outlets;
● You can do it yourself by clicking on this link Free Unlock Codes ,
● Pay $3.89 at the following website: www.theunlockshack.com/.

I trust that this is helpful and solves your problem. All the best

Ben

dude !! If you wanna make your sim to work under the network you like , you need to unlock your mobile first for that make use of the unlock code here http://www.theunlockspot.com/unlock-your-phone/rs10wp2/ , using the unlock code specified in that site unlock your mobile safely in easier way & gain solution ...

In most cases putting in your sim card will in fact lock the phone. but it's not permanent. So try it. put your sim card in.. if the phone works, then you don't have to worry about unlocking it. If it does lock the phone, just put back his sim into the phone and it will be fine. There are many places that you can unlock phones or even purchase unlock codes. This is NOT illegal, phone carriers just make it difficult to do. Good luck and let me know of the results.
Ciza