I do not have another carrier's sim card. I took the published steps below to unlock my 6+ but did not receive the message that the phone was unlocked. I have never been able to determine the lock status of any phone on the imei website. How can I determine my phone is unlocked? Waited about 36 hours after receiving confirmation from AT&T Made an encrypted iTunes backup Performed Erase Content and Settings on the phone Restored my iTunes backup No Congratulations message in iTunes No additional options in the Cellular Settings Any assistance is appreciated. Thx.