Error when I turn on my phone, please help :(

[dragniel]

So I just bought my M4 15 days ago and last night suddenly it started to turn off itself. When I turn it on, it turn on but not completely turn on. It just turn on the loading part wave. But vibrates from all messages and chats still comes and I can't turn it off again, it just turn off itself when it runs out of the battery... And when I charge, and turn it on again, it back to the loading part wave. I already tried to restart with pins but it didn't work... What should I do? Please :"

[Samuel1]

I suggest that you try to repair the phone software using PC Companion..

Before repairing your device you may want to backup your information first. Check out this topic for more information on how to.
How to backup?

If the issue should still remain I think that this needs to be examined and fixed at a repair center. For more information about how to submit your phone for repair and where, contact your local support team.