I updated my SGS2 last week to Ice Cream Sandwich and have had nothing but problems. My phone now lags so much. It freezes randomly, I have to do a battery pull almost twice a day. I also keep getting messages pop up that my GPS service has stopped working and that my battery indicator has stopped working. The only way to get those working again is to restart my phone. This update was long over due and a very big disappointment. My phone is a mess and I have no idea what to do. I want to put it back but it looks like it's much harder to do. Can anyone help?