If you're one of those people that *never* updates your iOS gadgets, listen up! "One of the biggest bugs that iOS 11.2 fixed was the December 2nd data bug that caused devices to crash repeatedly if users had certain apps with local notifications implemented." If that doesn't convince you to update, iOS 11.1 introduced more that 70 new emoji. Yes, the plural of emoji is emoji. If you use HomeKit, the new iOS 11.2.1 could also affect you. "Basically what happened is that Apple temporarily disabled remote HomeKit access to certain users after it was discovered that HomeKit was vulnerable to exploits in smart door locks and garage door openers."