Back in October, I wrote the following: I’ve got an iPhone. In fact, my wife and two of my three kids have iPhones. The iPhone is absolutely wonderful as a portable computer, camera, music player and casual gaming device. I use it to check on stocks, keep notes, view maps, find where I am, figure currency conversions, send instant messages, play Scrabble and more. But the iPhone is a disappointment as a phone . . . and the problem is getting worse, because every new iPhone user (Apple sells roughly 80,000 iPhones a day) puts greater demands on AT&T‘s...