Hi, I could not charge the handset and it automatically powered down last night. Thereafter I restarted it again without charging it and as expected it powered down after a few minutes. This morning I plugged in the handset for charging and then pressed the power button to put the handset in to 'sleep', to my surprise it did not work. I ignored it and left it for charging and when I checked back the handset had automatically gone to 'sleep'. I tried to wake it up by pressing the power button, but it did not work. The only way I can wake up the handset is either by calling it or plugging in the charger. I tried all of the following but none of them worked. 1. Removed the battery and left the handset for a few minutes and restarted it. 2. Removed the SD card and restarted it. 3. Removed the SIM card and restarted it. 4. Removed both the SD and SIM cards and restarted it. Has anyone else experienced this problem?