HELP! Carrier unlock 4.2.1
Hello, I have just got an iphone 4 from a friend and need to change it from o2 to vodafone. I have read so many articles and forum posts and blogs that I am now totally confused as to what the exact method is.
I have read that there is no way to do it on 4.2.1 but if i change the os to 4.1 i just need to jailbreak it with limera1n and then download redsn0w using cydia???
Is this the way to do it? As this is my first iphone I am not bothered about what os is on the phone and how fast it goes etc etc, I just want to get it working on vodafone.
Any help would be appreciated.