Lumia 925 keeps turning of itself once every 2-3 days.

[Gor Badoyan]

It runs 8.1 dev. preview. I did hard reset but it didn't help. And it can be turned on only by holding 3 buttons at the same time...

 

[shykhan16]

My L925 with 8.1DEV does sometimes shut ita self off but freezes before. I don't think there's anything to do to fix cause it is the preview. Just hoping that Cyan will fix this and the official 8.1 too.

 

[Roderick Aspiras]

You may have a defective unit there. Why don't you send it to Nokia Care? I'm sure they will be of help.