How do I restore my phone on a Chrome book that is the schools?
Okay so my phone say to contact support but I have a chrome book and I have to do it from there.
iPhone 5s, iOS 10
You cannot use a Chromebook to restore. The device needs to support iTunes, Chromebooks run ChromeOS which is a web only operating system.
Might be able to backup/restore using iCloud Backup on the linked Apple ID.
How to back up your iPhone, iPad, and iPod touch - Apple Support
