I have recently updated my phone to the latest 8.1 developer update. All over the forum has been written a ton about bug fixes, battery improvements and so on. Thing is.. I dont see any improvement at all. Since I updated my phone, some features are starting to screw up. For example my battery life hasnt improved at all, like not one single bit.. little usage during the day and i have to recharge the phone every night; the phone lost it's sound from nowhere (no notifications, calls or anything); if i change my ringtone to some other than the default Samsung one, after i restart the device the ringtone is changed.. again.. today my emails and messages went dead.. like frozen.. I have restarded the phone and everything went to normal, but someday I might miss something important, because the phone is "behaving like a teenage girl on her period. I'LL DO WHAT EVER THE EFF I WANT AND I DONT CARE!!". So if you guys have any thoughts on how to fix this, do share. Samsung ativ s is the device, done 3-4 hard resets.