Ok, my iphone 4 factory unlocked shipped to me with 5.1 already on it. I really want an untethered jailbreak but it's only available for 5.1.1. Would somebody care to talk me into updating to 5.1.1? I'm scared because a lot of people have complained about poor battery life with 5.1.1, their photo libraries getting jacked up, random things being jacked up, brightness being jacked up, etc. If the 5.1.1 update causes my battery to suck, can I downgrade back to 5.1? Thanks.