i ended up having to restore my iPhone 4S as I had some strange thing happen, i couldn't send/receive SMS, couldn't make/receive calls. Once I restored it, all was good again. Weird.
As for battery i don't think it'll improve, I lost 10% over night on standby. Maybe they need better batteries or something.
As for battery i don't think it'll improve, I lost 10% over night on standby. Maybe they need better batteries or something.