How to update ipad from version 9.3.5 to latest version

If you’re using an iPad 2, iPad 3, or first generation iPad mini, it’s running the newest iOS version it can. Otherwise, use the Software Update function or update it from iTunes on a computer.

(166102)

As stated above, it’s running the newest iOS version it can. iOS 10 and above require a more recent device.

(166103)

You can’t. If you need a newer iOS, then you need a newer iPad.