If I updated my iphone's ios, will I lose the unlock?

So I have iphone 3GS and I wanna update it to 4.3 ios using itunes, its currently unlocked so if i updated it will i lose the unlock?

Yes, you would have to get it unlocked again

It depends on how it was unlocked, if it was a factory or IMEI unlock, it is permanent and you will be fine, if it was jailbroken and software unlocked, then yes, you will most likely lose the unlock

If you did a jailbreak on the device to unlock it, yes.

stop messing around and just permanently unlock your iphone: http://gsmunlocklabs.com/unlock-iphone/

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