After a few weeks of technological bliss, my experience with the iPhone took an unfortunate turn yesterday. The bottom half-inch of screen has become unresponsive, which prevents me from accessing the on-screen keyboard while text messaging or hitting the space bar or accessing numbers and punctuation in those application in which I can get a keyboard. This is pretty limiting for many functions of the device. I've checked out this phenomenon online and it turns out this is a problem other users have experienced, even if rarely so. So I will be stopping at the Genius Bar in the Apple Store at West Farms Mall on my way home from the airport and I expect my phone will be replaced.