How to go from a apple iphone update 8.1 to the one before that?

Is there a way to go from a apple iphone update 8.1 to the one before that?

Apple no longer allows you to downgrade, so you can't do it. There's a method which only works when apple is signing. IOS 8.0 can't be installed any new devices.

No, not in a way that isn't breaking the terms of use that you agreed to with Apple. I also wouldn't recommend it because it would cause a ton of issues to not have your phone updated to the latest version.

So you basically mean downgrading the firmware. Yes, its possible but not recommended.

Another guy trying to jailbreak!