From the past one week I have been experiencing frequent freezing in BB bold 9900 and sometimes the screen goes completely blank but the trackpad lights up. When there is a blank screen and if I press the on Make Call, the phone makes a call to last dialed number but I cannot see anything on the screen. Even I can receive call from some other person but nothing will be displayed on the screen. I have to reboot the phone more than 2 times in order to bring back the screen to normal condition.
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