My 3G iPhone got version 2.2 (5G77) with Modem Firmware 02.11.07 and also officially unlocked from Australia. What I am thinking is what if I do use redsn0w for jail breaking then ultrasn0w for unlocking. Will my iPhone get back locked again if I use both? or Am I supposed to use only redsn0w for jail breaking then doing nothing with unlocking process?

Thanks anyway.