When i opened the Sony for first time, it was available an update that i did it. After sometimes, when the touchscreen is locked and i press the button in order to unlock it, it doesn;t respond. Touchscreen's light turns on without seeing the backround and the menu. The same happened two times as someone called me. Touchscreen didn't open although every move of my finger on it was acceptable. Please help me, i have the phine only 4 days.
