I have iPhone 4 (4.3.2) (latest iTunes on Windows 7). For past couple of days, my phone automatically stops responding to any button or touch. The screen becomes black/blank. I can revive it by pressing n holding power on/off and home buttons together for around 10 secs.
Since this morning, it has been happening almost every 15-20 mins. Just restored this afternoon but no improvement!
Can someone help me please!!