Redsn0w by allows you to jailbreak your iPhone 3G/3GS device, to get complete control over it (see why you should jailbreak ). Currently, redsn0w version 0. Apple Iphone 7 128 Unlocked. 9.6b5 allows you to perform a tethered jailbreak to your device that has already been upgraded to firmware 4.2.1, which means you need to use redsn0w every time you boot the device, otherwise all your jailbreak data gets wiped. In order to unlock, you must upgrade to an earlier iPad baseband, which would mean that you can update/restore using a custom firmware file only and not a stock firmware file, otherwise, the restore will simply fail. Also, it’s not reversible and by doing this, you will be voiding the device’ warranty. Please note that this tool will NOT work if you older iPhone 3GS, unless you use the unofficial Pwnage bundle first.