An exploit has been discovered that causes iPhones and iPads to reboot when sent a string of malicious text.The bug was found on Reddit, reports 9to5Mac, but the exploit has since been confirmed by Apple. If the offending 75-byte sequence of unicode characters are sent via a text message, and appear on a user’s iPhone lockscreen, the device will crash and reboot.
Read on, source: Bug causes iPhones to crash when sent malicious text message