Upgrade shuts off some iPhones

SAN FRANCISCO — Since the iPhone hit the market in June, tech-savvy owners of the phone have been busy messing with its insides, figuring out how to add unauthorized software and even “unlock” it for use on networks other than AT&T’s. But the Web was filled Friday with complaints from people who had installed the latest iPhone software update, only to see all the fun little programs they had been collecting disappear — or, still worse, see their phones freeze up entirely. Full Story