- 1). Turn off your AT&T phone and remove the battery cover. Removing battery covers varies with different phone manufacturers and modes, so refer to your manual.
- 2). Remove the battery from its compartment. You should see the SIM card.
- 3). Write down the SIM card number. The number is printed under a long bar code and starts with the numbers 89.
- 4). Write down the 15-digit IMEI number. This number is usually on a white sticker on the battery. It may also be found on your phone's original packaging. Refer to your manual if you are unsure where your phone's IMEI number is located.
- 5). Insert the phone's battery and replace the battery cover.
- 6). Go to the AT&T prepaid phone activation page (see Resources).
- 7). Enter your SIM card number in the "SIM Card Number" box and click "Continue." Type your IMEI number and click "Continue."
- 8). Locate the PIN on your phone's packaging and enter it into the "PIN" box. Click "Activate." Your phone is ready for use.
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