Sony Xperia T3 won't boot, resets all the time and can't boot up.

[ZleMyzteX]

Hello.
The phone won't boot up anymore. No matter what I try ( the volume up and power button thing were it vibrates ) it just won't boot. It doesn't get past the wave thingy.

Before that apps randomly closed ( stopped working / application stopped ) and it was generally really slow and laggy.

So now i don't know what to do with the phone, it simply won't turn on.
Any ideas on what to do with it?

 

[lujodelija]

Hello, i have something like that, only way to fix was flashtool

 

[JeykDeuz]

help

The same thing happens to me, every time a notification comes out that the application stopped ... and there comes a time when it freezes and no longer turns on, I repair it again with Xperia Companion and after a few weeks it fails again , does anyone know why this happens or what problem does it have?

I have not yet flashed with flashtool because I do not know the process and I do not know what room to use, please help.