AT&T Activating Your Phone

New Customers (New Individual and Add-A-Line)

Service activation

  1. Before you begin, follow the instructions in the owner's manual to charge your phone's battery.
  2. Make sure your phone is turned off, and install the AT&T smart card provided with your order (if your device came with a pre-installed SIM, please replace it with the one provided separately in your order). The AT&T smart card is just under an inch long and half an inch wide and is packaged in a piece of plastic the size of a credit card. Refer to the owner's manual if you need more help completing this step. The owner's manual will sometimes refer to the smart card as a SIM card, which stands for Subscriber Identity Module. (Note: To ensure proper activation of your phone, you must use the new SIM card that came with your phone.)
  3. Turn on your new phone. In about 15 minutes you'll receive a text message on your new phone with your new phone number.

Existing AT&T Customers (Contract Extensions/Upgrades)

How to activate your newly upgraded phone

  1. Before you begin, follow the instructions in the owner's manual to charge your phone's battery.
  2. Make sure your phone is turned off, and install the AT&T smart card provided with your order (if your device came with a pre-installed SIM, please replace it with the one provided separately in your order). The AT&T smart card is just under an inch long and half an inch wide and is packaged in a piece of plastic the size of a credit card. Refer to the owner's manual if you need more help completing this step. The owner's manual will sometimes refer to the smart card as a SIM card, which stands for Subscriber Identity Module. (To ensure proper activation of your phone, you must use the new SIM card that came with your Costco.com phone.)
  3. In order to ensure your phone, plan, and service options are activated correctly, you must call AT&T from another phone at 1-866-895-1099, where you will be guided through the activation process.
  4. Turn on your new phone. In about 15 minutes you'll receive a text message on your new phone notifying you of activation.
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