jail How to detect iPhone 3GS bootrom version

iPhone 3GS jailbreak can be either tethered or untethered. Tethered jailbreak means that each time you restart your device you will need to connect it to a computer and run redsn0w. If you have iPhone 3GS with an old bootrom version 359.3, the jailbreak is untethered. If your device has bootrom version 359.3.2 and higher, iOS 5/4.3.5 jailbreak will be tethered.

You can read tutorial to detect if your iPhone 3GS has new or old bootrom version here.

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