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No, that's an "official" unlock and can't be simply locked back. It should be unlocked for the life of the phone. I guess your carrier can re-lock it but highly doubt that would happen.

Plus haven't you been around long enough to know the answer to that question?
 
No, that's an "official" unlock and can't be simply locked back. It should be unlocked for the life of the phone. I guess your carrier can re-lock it but highly doubt that would happen.

Plus haven't you been around long enough to know the answer to that question?

I have to make sure since I'm jailbreaking someone else's iPhone 5 for them
 
I had a jailbroken iPhone that was unlocked by fusion. Restored it back to original settings before I sold it to a T-mobile user and it was unlock still . Like the users above said, it should be unlock forever. At least I didn't have any issues.
 
Jailbreak won't relock the phone, also I just replace my ip5 at the apple store and the unlock get transfer over to my replacement phone.

Did you have to do anything?

I did mine through unlock fusion, but I thought it was specific to the phone. Will they really give me a new unlocked phone?
 
No I don't have to do anything, I just pop in my extra tmobile sim to test it.

If the phone you trying to replace is unlock, it will transfer to the replacement phone.

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