https://www.theregister.co.uk/2017/12/04/apple_sprays_down_bugridden_ios_11_with_more_fixes/

Apple has posted an update to address a host of bugs in its iOS mobile software.

The iOS 11.2 update patches both security and stability bugs in the iPad/iPhone firmware. It will also improve the wireless charging for new iPhones and add a payments feature to Siri and Messages, Apple promises.