If you don’t see “ICCID,” it may be printed next to “CSN” or “EID. "
Go to https://www. att. com/checkmyorder/activations/activateDevice. rt in a browser. Enter the phone number you want to transfer and the billing ZIP code. Click Continue. Provide the requested information and follow the on-screen instructions to activate your card.
If you’re unable to activate the card online, you can give AT&T a call from a working phone or visit an authorized AT&T store during regular business hours. AT&T support is available 24/7. If you’re in the US, dial 1-800-331-0500. If you’re outside of the US, dial 1-314-925-6925. [4] X Research source