Use a compatible phone you own Place your SIM card into the phone, then update your IMEI number in myPREPAID If your old SIM card doesn’t fit, get a new SIM card kit. Pick one up from an AT&T authorized retailer, like Walmart, Best Buy, or Target. Then, go to myPREPAID to activate your SIM and update your IMEI number

Buy a compatible phone online Place your SIM card into the new phone, then update your IMEI in myPREPAID. If your old SIM card doesn’t fit, get a new SIM card kit. Pick one up from an AT&T authorized retailer, like Walmart, Best Buy, or Target. Then, go to myPREPAID to activate your SIM and update your IMEI number.



Sign in to myPREPAID. Select My Device, then Update Device. Follow the prompts to update your IMEI or SIM card number.

Talk and data services won’t work for wireless phones and devices that don’t support at least 4G LTE and HD Voice. Find out if your phone will still work on our network (PDF, 181KB) If you get a text message from us, check it to see which of your lines have phones that won’t work after we phase out the 3G network.: Newer phones have many benefits. Enjoy AT&T Call Protect, which helps prevent robocalls. Plus, you’ll get faster download speeds, high-resolution cameras, better sound quality, and more.Then, find out how to update your IMEI, SIM card, or both. To get started:You can recycle or donate your device to Cell Phones for Soldiers