We have heard a lot of rumors arround the web that geohot has an exploit for iPhone 4 to unlock baseband 03.10.0 or 2.10.04 running on iOS 4.2.1and it was also rumored that he might release the unlock with name of Rubysn0w.
But according to the statement came from his official blog has ended all the rumors regarding to iPhone 4 unlock. In a reply to a comment he clears that he have no iPhone 4 exploit and even he is using iPhone 3GS!
I wish I had an iPhone unlock, the simple BB holes appear closed (my fuzzer comes up blank). In fact, I’m still using my 3GS cause I don’t have one :-/