02-15-2013 01:13 AM
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Whenever you feel anything unusual always the best practise is a battery pull restart , do it by removing the Battery while your device is Powered On wait a min then re-insert it back , after reboot see if problem resolves.
Also make sure that you are closing all application properly Always try to Close Applications Correctly - Avoid using the End key to close applications as this simply minimizes the application and leaves it running in the background. Instead, press the Menu key, select the Close or Exit option to exit the application.