Enlarge / An iPhone 5 running iOS 10. Version 10.3 is likely to be its last big update. (credit: Andrew Cunningham) Apple has just released iOS 10.3 to the general public, an update which is likely to be the last major release of iOS 10; at this point in the year, work usually begins in earnest on the next major release of iOS, which will be revealed at WWDC in June.