iFrog said:You have the perfect version!!!
go in the phone browser (Safari) to JailbreakMe 3.0 and follow the instruction there, you will be jailbreak fast!
kingnba6 said:whats the current ios for gsm iphone 4? and whats the easiest jailbreak ? i need to help my friend because they messed up their iphone 4 but i dont want to upgrade it and not be able to jailbreak it