How to Unlock an AT&T Android Phone

by Marissa Robert

AT&T and other cellular providers using Global System for Mobile Communications, or GSM, technology install SIM cards in their customers' mobile phones to identify each device to the network. If you want to take your AT&T Android phone to Europe or Canada and use a world plan there, you can do so, but first you will have to unlock the phone for use outside of the AT&T network. Otherwise, the phone won't be able to accept another carrier's SIM card. If you just use your phone without subscribing to a plan on the carrier's network, you may incur much higher charges.

Step 1

Push the "Home" button on your Android phone to go to the home screen, then press the "Menu" button and tap "Settings." Tap "Status" and scroll down to the IMEI number. Write down this number.

Step 2

Call AT&T customer service at 800-331-0500 and ask the customer service representative for the unlock code for your phone. The agent may ask you for the phone's IMEI number that you wrote down in the preceding step.

Step 3

Turn your phone off.

Step 4

Remove the battery cover from the phone, then remove the AT&T SIM card from the device. On some Android phones, accessing the SIM card may require that you remove the battery.

Step 5

Insert a SIM card from another mobile carrier into the phone. Re-install the battery if you had to remove it and close the back cover.

Power on your Android phone. When prompted for the unlock code, enter it in the provided field to unlock the phone. You may need to change the APN settings on your phone for it to work properly on the new cellular network. These settings differ depending on which mobile carrier you are using and where you are in the world.


  • AT&T may not give the unlock code for phones that they have the exclusive right to sell.
  • Unlocking the phone is not the same as gaining administrative access or "rooting" it. Rooting the phone allows you to install a custom operating system and may violate AT&T's terms of service. Unlocking the phone only allows you to use it with other carrier's SIM cards.


  • You must have had service for at least 90 days and your account with AT&T must be in good standing to obtain the unlock code for your Android phone. If you have a prepaid plan, you may be able to obtain this code if you've had AT&T service for at least six months or you have an original receipt to prove you bought the phone.


About the Author

Marissa Robert graduated from Brigham Young University with a degree in English language and literature. She has extensive experience writing marketing campaigns and business handbooks and manuals, as well as doing freelance writing, proofreading and editing. While living in France she translated manuscripts into English. She has published articles on various websites and also periodically maintains two blogs.

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