Once while receiving a file thru bluetooth, my mobile suddenly became switched off automatically. After restarting, it was going off and on almost every 2 or 3 seconds. A technician re-installed the operating software and it started to work fine again. But the display became dull. I had tried adjusting the display settings,but it didn't help. The technician told me that there are some codes by which he can restore the brightness, but unluckily the codes were unavailable with him at that moment. Later, he had left our city and I am in dilemna. If anyone can help me out, I'd be very glad.
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