How to update ISO on a non-Apple computer?
How to update ISO on a non-Apple computer?
iPhone 6s, iOS 13
Question marked as
Update your iPhone, iPad, or iPod touch with iTunes - Apple Support
This assume that you have a PC and have downloaded and installed iTunes for Windows on the PC. A Chromebook is not a PC.
Note.....an iPhone 6s can be updated as far as iOS 15.7.1. iOS 16 cannot be installed on the iPhone 6s.