Join Date:Joined: Sep 2010
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The first step in trouble shooting this will be to flash the phone back to stock and observe to see if the behavior is the same. If the problem is caused by some kind of firmware glitch, this should correct the problem. If it does correct the problem, you should then be able to flash SHOstock3 again (or any custom firmware) and the issue should be corrected.
If this does not solve the issue, then we would begin to think that maybe there is some kind of hardware issue.