Inventory and backup
Upgrading and jailbreaking to firmware 2.2 does not remove anything authorized from your iPhone. All you have to do is make a list of Cydia app's to reinstall after the jailbreak. Here is my list of favorite Cydia apps:
- Mobile Terminal
- RapTones Vol 1
- Safari Addon Plugins
I previously let iTunes download firmware 2.2, but I didn't install it. With firmware 2.2.1 available, I have to trick iTunes into installing the older firmware 2.2. In iTunes, in your device's Summary section, in the Version section, shift-click the Update. (Thanks to The "Break it Down" Blog for the clue.) Select your 2.2 firmware file--mine is at C:\Documents and Settings\kasper\Application Data\Apple Computer\iTunes\iPhone Software UpdatesiPhone1,1_2.2_5G77_Restore.ipsw. During the upgrade, the iPhone reboots, displaying a Steve Jobs saying something in Russian. After a few minutes, the iPhone reboots. iTunes notices the iPhone and reports that an incompatible SIM is installed. Time to jailbreak and unlock
Jailbreak and unlock
I download QuickPwn 2.2 and the two bootloader files from iPhone Hacks. I install and run QuickPwn. I play nice, following the instruction, and the iPhone is back up and running in a few more minutes.