Samsung Galaxy S2 and I did the latest upgrade.. the result?? My battery life is cut in half My phone now constantly drops calls at 2 seconds into the call When plugged into a wired head phone for calls the Music app starts and plays all my sound files There is no way to uninstall bothersome Google Apps.. like Google Music/play Every app that I normall use is very much slower even on starting Based on all of those problems I would classify the "update" more correctly as a VIRUS as it took a very usable phone and made it functionally useless. When I have to dial a call 4 times every time just to make 1 call with out dropping the call...??? This update does act more like a virus rather than a well developed and tested upgrade. There should be an uninstall for the upgrade.