nokia 8800
 

hi guys have a nokia 8800 which is not working f9.pro is its just keep turning on and off. every time when i play sound track or recive any call its just go off and after come back on in 2 sec .i tried new battery and reflash it with latest software but its still same. i think its very common pro in them phones.is there any solution available for this pro if yes then help me.that will be great .thanks....