Imei Service Details - AT&T iPhone All Models Unlock Active Line
This service is still IN TESTING which may cause DELAYS and NOT FOUND reply status.
NO REFUND for IMEI's which were unlocked and confirmed by SIM lock status check service.
NO REFUND if IMEI got unpaid bills or any other status after unlock.
NO REFUND IN CASE OF DELAY
Use AT&T IMEI checking tool before ordering to make sure that device has Active ine status:
iPhone Blacklist / Barred / Contract / Fraud Check + Unlock [AT&T US]