Apple has resolved an an issue that caused some iPhones to unexpectedly start auto-correcting the letter “i” to a capital “A” and a question mark.
The issue emerged when people updated their phones to version 11.1 of the iOS operating system.
Apple said people could “fix it by installing the latest software update”. The update ( iOS 11.1.1 ) also addresses an issue with Siri. Apple has not explained what caused the problem.
Users can find the update available through the Settings app under General and Software Updates.