Hello, I have a jailbroken 3.2.1 ipad using spirit. I want to upgrade to 4.2.1 and use greenpois0n RC5. Will I lose my data/applications? what would the correct steps be? I think the steps should be the following, pleaese comment 1. Connect to ITunes and backup/sync 2. Upgrade to 4.2.1 using ITunes 3. Perform greenpois0n jailbreak Will my appz still be present after the jailbreak?