Hey guys, I bought this iphone 3GS on 4.3.4 with baseband 05.16.02. I spent some time reading about upgrading the baseband to 6.15. So I was able to downgrade the phone to 4.1 and the baseband is still at 05.12.06. I tried to jailbreak and iPad baseband it with redsn0w but it wouldn't do anything, just put me to a white screen everytime. So I tried the older PwnageTool 4.1.3 Unlock version and it will jailbreak the phone on 4.1 but it will not update the baseband to 6.15. I have tried countless times to do the baseband and it isn't going anywhere. I am lost and was wondering if anyone could help, Thanks.