my Ultra has been doing strange things in the last 48Hours. The screen goes in standby mode normally but it would not wake up. neither with the home button or with the smart wake. Also the ON/OFF button does not help.
I know the phone is still functioning. I can hear the sounds of apps, and If I try to call my number from another phone, I can hear it rings.
But with a black screen you can do nothing. I had to open it and take off the battery to restart it already 4 times today. It's unpredictable.
I need a working phone..
what can I do?
thanks for answering.