Hugh Pickens writes "The Telegraph reports that dozens of users of the recently released iPhone 3GS have reported overheating issues, with some iPhone owners unable to pick up the device because the handset gets so hot to the touch, while others say the casing turns pink with the heat. 'I am definitely experiencing issues with the iPhone running warm and quick battery life lost,' writes Tom Goldstein on one discussion board. 'The phone seems to warm up almost immediately if I am doing anything that pulls data over the network.' Some users have said the device has been too hot to put to their ear while making a phone call, and others say the overheating seems to occur when owners are using the iPhone's mapping software, which uses the handset's built-in GPS technology. Melissa J. Perenson writes at PC World: 'I became aware the handset had become very hot. Very, very hot — not just on the back, but the entire length of the front face, too.' Some gadget experts believe faulty batteries could be the cause of overheating and poor battery life. 'My guess is there's going to be a whole lot of batteries affected because these [iPhones] are from very large production runs,' said Aaron Vronko, who fixes iPods and iPhones. 'If you have a problem in the design of a series of batteries, it's probably going to be spread to tens of thousands [of device], if not hundreds of thousands, and maybe more.'"