Can I update my iPhone to unsigned iOS using shsh.host?

[TNFX]

Now I’m using iPhone XR with iOS 13.5, jail broken with unc0ver. All this time I was saving new iOS versions and now I want to know - Can I use it to upgrade iOS to 14.1-14.3 AND SAVE ALL MY STUFF (excluding jailbreak of corse). And jailbreak again with NEW UNC0VER? If I can do it, can you, please, explain, how to make it and don’t break my phone. Thanks!!!

P.s. deleted old post because I’m afraid to show my ECID

[Wayne]

You might be able to restore to 14.3 if you have the blobs but you will need the baseband and sep from 14.4.
Look here to see the tool.
https://jailbreak.fce365.info/Thread-NEW...or-Windows