I'm about to jailbreak my iPhone 4, ver 4.2.1 using Green Poison. I know that there are obvious standouts when your phone is jailbroken, (ie exposed jailbreak apps) but I need to make it look like my iPhone was never jailbroken. I know I can use bossprefs to hide apps, but what about syncing? Does syncing stay the same when you jailbreak or do you have to do something prior? Also, are there other precautions? Thanks.