Promised thing thing due. Deployed last Saturday, iOS 11.2 brings some novelties and fixes some bugs. Notably, the activation of the fast wireless charging on the iPhone 8 / Plus and X. Thus the two flagship Apple are now compatible with the standard Qi limited to 7.5W. Good news for the users concerned. To take advantage of it, you will need to invest in a charging base like Belkin or Mophie, these are dedicated to the latest smartphones of the brand to the apple and support the same load power.
Note that the iOS 11.2 update corrected the calculator problem and improved battery life.