"I found something that "works" but it's not really a fix and is really really annoying," posted Resterix, who with his wife and a friend all had factory-unlocked iPhone 4S models. "If I turn off 3g and cellular data, and then do a hard restart of the phone, we can go all day and only lose about 15% of battery life. Once I turn 3g or cellular data on, even with all apps closed, we'll lose 1% every 3-5 minutes on standby."
He describes a maddeningly manual sequence of events: "So, if i'm out and want to use data, I have to go into settings, turn on 3g and cellular data. Do the thing I wanted to do. Then, go back into settings, turn off 3g and cellular and then do a hard restart.. I am thinking it has something to do with the factory unlocked iphones, as my friends who have carrier locked phones don't seem to have any battery issues."
Sign up for CIO Asia eNewsletters.