mobile

HELLO :3 NEW HERE

and i have this unit SONY XPERIA RAY ST18a

and my problem: STUCK ON LOGO or AUTO RESTART after the logo SONY / XPERIA appear.

i use PC COMPANION and it works and several weeks it returns to its problem and i try again PC COMPANION,

and after i use bluetooth it return to it's problem.

any solution please?

btw, how to unlock it's bootloader?

Thank You and GodBless.

MorePower.