The touch screen on my carbonn A26 is all messed up. It works well most of the time, but when it glitches up my phone becomes useless. The problem is that the phone does not respond to touch some of the time. In other words, I cannot answer a call, look up contacts, or pull down my alert bar. When my phone is acting up, I can't slide the pages left or right, or even dial numbers. When I press *611, I get 486 or 949, or sometimes nothing at all. The problem is intermittent...pls help...urgent