Looks like Apple’s New iPhone 5S has an unexpected feature : Blue Screen Of Death (BSOD). A typical error found on older versions of Windows PC’s .
A number of iPhone 5S users are reporting random reboots on their handsets following a BSOD. The blue screen reboots appear to be iPhone 5S specific and are largely occurring with Apple’s own iWork apps that come free with all new iOS devices. Videos detailing the issue show that multitasking between apps seems to trigger the BSOD. iPhone 5S users are also reporting random reboots during device use.
One workaround to alleviate the iWork-related reboots is to disable iCloud syncing for Apple’s Pages, Keynote, and Numbers apps.
via The Verge