It's a software malfunction try removing the battery WHILE THE PHONE IS ON also remove the sim card. Replace them and power it up. If it doesn't fix it you need to hook it up to a computer and update the software. It is an old phone so don't be too surprised if none of that works. You probably need a new phone. And I wouldn't recommend another BB get an HTC phone they last much longer =)
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It's a software malfunction try removing the battery WHILE THE PHONE IS ON also remove the sim card. Replace them and power it up. If it doesn't fix it you need to hook it up to a computer and update the software. It is an old phone so don't be too surprised if none of that works. You probably need a new phone. And I wouldn't recommend another BB get an HTC phone they last much longer =)