Will my iphone 4 stay unlocked?

Hi, I jailbroke my iphone 4 ios 6.0.1 with tethered as it is what available right now- meaning I can't reboot the phone normally and have to go through redsnow "just boot" and I unlocked it with ultrasn0w so that I could sell it. Now, if i were to reset it to factory setting, will i lose the unlocked status of the phone? How does that work?

Yes, because you loose the jailbrake, thus the unlock.

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