02-01-2014 4:46 PM
02-01-2014 6:18 PM
Go to an ATT store and they will most likely give you one depending upon what plan you choose. They may charge you for a GoPhone SIM but you never know. No need to purchase one from a third party. You will not be able to activate your iPhone without a sIM.
02-02-2014 7:01 AM
If the phone was originally from AT&T (and hasn't been unlocked), you will need an AT&T SIM card to put in it.
If it is an AT&T - Locked Device, you will be able to get a SIM card for this device, regardless of contract/plan type or if you want it to be a Pay As You Go Phone.
You can either purchase one from ATT.com (free for contract phones, $9.99 for GoPhone) or visit an AT&T Retail Store.
If it's locked to any other provider, you'll need to inquire with them on how to go about activating the phone.
02-02-2014 7:53 AM
If all you are concerned with is getting past Apple's activation process, any valid SIM card will work. The sim does not even need to be active.