If anyone can solve this problem I would be extremely greatful - this problem is really doing my head in!! Swopped my phone with someone I didn't know and I think i know now why they wanted to swop it. Samsung Galaxy Alpha SM-G850F in the UK on Vodaphone Android 5.0.2 After resetting the phone upon receiving it and using it for a few hours the damn thing keeps powering off and on by itself - no set pattern of when it chooses to do so. Tried various things from the web, removing battery, starting up in recovery and wiping cache, starting up pressing power & home buttons is the only way for it to start fully but then shortly after powers down again. There are a few webpages commenting that the partition may well be corrupt and to re-install a stock firmware which I have tried with KitKat 4.4.4 and now Lollipop 5.0.2 - the device has previously been routed also. I have tried to get my head around how to re-partition the device using ODIN but everytime I try to do so I either get ODIN requesting a PIT file which I do not have or it freezes trying to connect when using some firmwares (all stock). I haven't tried to flash a custom firmware yet - bit sceptical if that would be any different. Convinced that the partition is corrupted but don't know how to re-partition it - any help would be appreciated. Thanks in advance . . .