Hi I want to upgrade my iPhone to a custom 3.1.2 firmware (i'm on 3.0.1 jailbroken and unlocked) and I have Push working perfectly using a At&T sim card to activate then swithcing to my tmobile one, well I was wondering when upgradeing to 3.1.2 do I download the Activated custom firmware or do I download the unactivated one? I want Push back and will be using the same method but don't know which custom firmware to download