No power at frst my phone loud speaker was not responding some times.at this time when i beat the phone by my hand, the loud speaker will start.this action continued for a long period of time.onece a day it switched off while it was in my pocket.then i have charge it and the power lights up with out loud speaker.i beat it as usual.at this it immediately switched off and unable to open.i took it to the maintenance office but they cuold not repair it, thoudh they have tried to flash it through computer and drying it by elctric device.