Will Jailbreaking my iPhone 3GS ruin my unlock?

I have an AT&T iPhone 3GS on 6.1.3 (I know there's no jailbreak for it yet, but I know an untethered is being made) and I have it unlocked to be used with T-Mobile. If a untethered jailbreak comes out for 6.1.3, will my unlock be ruined and not let me use my T-Mobile services?

ps. I have it unlocked, not jailbroken, so I don't have cydia

If your iphone is factory unlocked then you will not lose your unlock, but if you used ultrasnow from cydia, then you will lose your unlock after you restore. I would recommend you factory unlock your iphone so it will always be unlocked. I do that to if you need it.

Nop You can Easily jailbreak your Phone