I have an iPhone 3GS 32Gb with 4.3.4 firmware and baseband ver. 05.16.02. I am aware that you cannot unlock the phone as such, but I've understood that by upgrading the baseband to 06.15.00 (I know the risks) ultrasn0w would work and the phone will be unlocked. I have not found a single guide on how to upgrade the baseband with 4.3.4 firmware. The first redsn0w version which recognizes 4.3.4 firmware has not the option to "Install ipad baseband" which would do the magic. So would anyone know how to do the baseband upgrade on my phone? Help would be greatly appreciated.