Do I need to go to AT&T to activate my iPhone?
A new iPhone bought through AT&T should arrive with the SIM card installed and activated. However, if it didn't, you should be able to activate it right on the phone itself. via
What is the activation code for AT&T?
Enter *123*, your ZIP Code*, the 2-digit plan code, then # on your phone's keypad. For example: If your ZIP Code is 90210 and your 2-digit plan code is 87, you'd enter *123*90210*87#. Tap the call button and follow the prompts to activate your plan. via
How do I transfer my AT&T service to my new iPhone?
How do I activate my new iPhone?
Press and hold the Power button (top-right edge) to power the new iPhone on. From the Activation screen, confirm your phone number then tap Next. If confirmation fails, see this Apple support info. Enter the account PIN or the last 4 digits of the account owner's Social Security Number (SSN) then tap Next. via
Do I have to call AT&T to activate my phone?
Now you're ready to activate your phone
To activate a new line of service or a replacement device, please go to the AT&T Activation site or call 866.895. 1099. Important Message: Phone service must be activated within 14 days of shipment or service may be canceled or interrupted to protect your information. via
How long does it take for your new phone to activate?
Typically, you'll be able to use the device within a few minutes. However, in some cases, it may take up to 24 hours. via
How do I know if my AT&T SIM card is active?
The best way to see if the SIM is active would be to insert it into a device which has a compatible SIM card slot. The good news is inserting any older SIM card into a phone will not harm the phone in any way or change any of the settings. via
Can you just swap SIM cards on AT&T phones?
SIM Card Basics
If you have two AT&T phones, or two T-Mobile phones, you can transfer wireless service between them by moving the SIM card from one device to the other. You don't have to take your phone to a retail store, or otherwise get any special permission to switch. via
How do I activate my prepaid SIM card? (video)
How do I activate my new iPhone 12 on AT&T?
How do I transfer my service to my new phone?
How do I transfer my AT&T service to another phone?
Why is my phone saying iPhone is not activated?
You may receive this error if your SIM card has gone bad (or another one has been activated which is a sign of fraudulent activity), you do not have a SIM card in your phone, your phone is not compatible with the SIM card that's in it (i.e. the phone isn't unlocked), or some other major issue. via
How do I know when my iPhone was activated?
With the cable that came with your iPhone, connect your iPhone to your computer. Locate your device on your computer. Wait while your computer detects and activates your iPhone: If you see an alert that shows "Set up as New" or "Restore from Backup," it means your iPhone is activated. via