Restore to Re-jailbreak?
my Iphone 3g is experiencing a few probs (namely the settings won't open just hangs then goes back to main screen). I have been advised on this forum to restore the phone. Could someone reccommend a way to restore/re-jailbreak. Its running OS4 (I think can't access settings!!!). I aam a bit fearful of the operation to be honest because I am worried the phone will lock back to the original carrier and then I will not be able to access jailbreakme which is the only method I have ever seen used. Any advice would be really great thanks (especially if I could repair the fault without restoring)
Many thanks from a total NOOB!