Apple just pushed an iOS update to fix that 'i' autocorrect bug
Over the last few days, most iOS users have experienced the same peculiar bug: the letter “i” was autocorrecting to… something else. Sometimes it was an exclamation mark. Sometimes it was “A.” Sometimes it was a question mark in a box.
A fix was said to be just around the corner, and sure enough: Apple has just sent out a patch that fixes that rando-replacement once and for all. iOS 11.1.1 is now available, with this fix marked as the flagship feature.
Need the update? Just pop into Settings > General > Software Update and let iOS do its thing.