Factory Unlock AT&T iPhone 4, 4S, 5 Now!
Factory Unlock AT&T iPhone 4, 4S, 5 on iOS 7 / 6.1.3 / 7.0.4
How to Check AT&T Carrier & Unlock details
Note: Use this AT&T IMEI checker to check whether your iPhone 4, 4S, 3GS, 5 is locked to AT&T carrier and your Simlock Status. This IMEI checker can check only AT&T IMEI numbers. If your iPhone isn't locked to AT&T carrier you can check your device here.
How to Unlock Your Locked iPhone 3GS, 4, 4S, 5 on any Baseband?
Your LOCKED iPhone can be Factory Unlocked Using OfficialiPhoneUnlock, this carrier IMEI unlock service is safest, tested and highly recommended by UnlockBoot.