I went to my tuiton class,then my teacher asked me to update the phone.Then i updated the phone.The system then download about 180mb i think then the package completed.I press "update the package now".It turns to an android that being fixed.Then it was completed.it then rebooted as usual.But theres a samsung logo splashes thousands of time.I didnt know what to do about it.Its my father's phone. 