Weird things are happening. In settings, I cannot login into my Apple ID. I enter email, password, tap sign in and nothing happens. Also, I constantly get 'Cannot connect to iTunes store' message. Sometimes, when I do manage to login in Settings, I open Appstore, it says it cannot connect, and when I open Settings I'm not logged in somehow. I tried to reboot, but it doesn't help. What the hell is going on and how to solve this? Thanks!