After less than a month of use, and my usual OCD high degree of care of my iPhone, the bottom one-half inch of the screen (with the phone vertical) stopped responding to touch. This means no access to critical functions: in keyboard mode, no space bar, "123" etc; in SMS no access to new text box; in iPod, no access to volume control. Spoke to Genius Bar in two stores, both of whom suggested the usual litany of remedies I had already tried (soft reset, hard reset, full "restore", etc). Of course, none worked. No hint of any topic like this on Apple's support site. Finally had to take 2.5 hours off from work to make the "first" (ie 10 am) Genius Bar appointment. No one there had slightest clue about cause of problem, and all said they had never heard of this. Finally decided (which I had known for 3 days by then) it was a hardware problem, had to send the phone back (that was first 45 minutes). "Rented" me a loaner -- *I have to pay >$30 to "rent" a loaner while they fix a hardware defect?!?!?!?!* -- which of course then took another 20-30 minutes to fully "restore" to my settings (which, in case you run into this, does not actually include "all" your settings). Probably the most "un-Apple-like experience I've had in 20+ years as a Mac fanatic, including running one of the only "all-Mac" law firms in the country.
MacBook Pro,
Mac OS X (10.4.10),
long time Mac user