I am using Samsung Galaxy Pro B7510. The problem is that my touch screen is not working sometimes. It has been like this for several weeks. I use Pin lock feature to unlock the phone and EZanswer Trial to attend calls. This is possible only because of the qwerty keyboard. Without which I would be doomed. Some times the touch screen starts working for some time and then, without a warning, it becomes not responding. No error messages are seen.
This all started when after I upgraded it into GingerBread 2.3.6 and rooting . After seeing this problem, I downgraded into the stock rom, unrooted it, and everything.
Not sure if its a software issue or hardware problem.
Any help will be greatly appreciated.