A few days after each iOS release, the new and old ones 'overlap', meaning Apple's servers will accept both being installed/uninstalled. ie. You can't now. This, from howtogeek.com...
**Restore Using an IPSW
Apple only allows you to load “signed” firmware images, or versions of iOS, onto its...
Afternoon,
My iPad Air (two years old) still runs with OS7. I have no immediate reason to upgrade... apart from the rumoured improved battery life, snazzy improvements etc, and being able to install apps, more and more of which require at least iOS8.
I remember trying out iOS8 last year but...