Will jailbreaking my iphone 4 remove the unlock i have for tmobile?

I want to jailbreak my iphone 4 which is currently on ios 6.1.3 if i do this will it remove my unlock that i got for tmobile. Att store was the one that unlocked my iphone.

I believe that you have what it's called a factory unlock, if it was from AT&T. If that is the case, you should not loose your unlock. But jailbreak for 6.1.3 it's semi-untether.

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