I have a 2G iphone with FW 1.4 and the 3.9 fake bootloader that I activated and unlicked using iplus. I now want to upgrade to the latest fw using winpwn 2.5. As my phone is already unlocked and jailbroken what do I need to do to get it to 2.1, activated and unlocked so I cxan use the apps store in itunes.