Well I'm on my second z310a. My first one basically stopped working due to the screen. The second one which I was currently using is broken in a weird way; It keeps like turning on and off, and it freezes, and once it just constantly vibrated, and another time it kept making this loud noise until I took out the battery.

How can I fix this??? I would appreciate if at least the problem to the second phone could be fixed!

Thanks in advance!