iPad Air futurerestore update problem

[BartuHTC]

I have been trying to update my iPad Air from 9.0.2 to 11.3.1 using futurerestore. I have set correct nonces, checked blobs with Conan, nonces with nvram -p. However I keep getting errorcode -2 after entering the recovery mode. How can fix this problem?

 

[J. A.]

I’m afraid it won’t be possible to restore to an iOS version other than the ones Apple is signing right now. That’s 11.4 or 11.4.1 at the moment, for the iPad Air.

 

[BartuHTC]

It is possible to do with blobs and futurerestore actually. I try to do it as instructed at jailbreakstatus.com but fail.

 

[scifan57]

It is possible to do with blobs and futurerestore actually. I try to do it as instructed at jailbreakstatus.com but fail.

It is not possible despite what you've read and heard.
The final part of an iOS restore procedure is an online verification with the Apple update servers. If the iOS version you're attempting to restore to is not signed by Apple, the verification will fail and that iOS version will NOT be installed.