I have recently updated my Samsung S3 to android 4.3 and am facing huge problems regarding the performance, battery etc...Often I have to remove the battery to reboot the phone otherwise there is no other alternatives to use it. Apparently these issues are now known and just wish to switch to the older version of 4.0 or 4.2 etc.....Can someone suggest something ? I presume it is going to take a while before Samsung solve this software. Thanks to all.