Earlier this year, reportedly faulty exploding iPhones in Europe caused a whole lot of finger pointing at Apple and its suppliers-but more often than not, iPhones get sent to the repair shop because of user slip-ups. Aaron Vronko, CEO of Rapid Repair, an iPod and iPhone repair shop, and one of the first technicians to take apart the iPhone 3GS and write a repair guide, has seen his fair share of reasons why broken iPhones need emergency surgery. Here are his six favorites, along with advice on how to triage the problems: