I just wanted to try update, but then i changed my mind and did files compare with 5.2.2. Literally, everything is same. As i had problems with 5.2.2, phone just randomly reboot at some point and wipes all apps data and contacts, only media files, apps and messages stays, happened twice and don't like theme, i switched back to 5.2.1. Also build.prop in 5.2.2 and now in 5.3 is same file, and it's all messed up. Just my feedback.