Help/Support Preparing to Restore a Jailbroken iPhone

[FateEX 1.6k iPhone Xs Max 13.4.1]

So I am switching carriers for my iPhone 6 Plus and in the process, I am required to restore my iPhone to unlock it to work with the new carrier. It is Jailbroken at 8.3 right now and I am looking to restore it back to 8.3 to re-jailbreak it. I know I can save screenshots of everything I have so I can redo/re-add everything manually, however I'm looking for any quicker/sensible solution that might exist out there. I've read a post about a tweak called PkgBackup from BigBoss that creates a backup file of all things related to your jailbreak like tweaks and stuff. I'd like to know if anyone's tried backing up using this tweak or know of a better method that has worked and isn't too shady. And if you tried PkgBackup, up to what extent is what backed up? Like are all your tweaks you had restored? All Cydia apps restored? Repos are re-added? .plist files from Custom UI tweaks saved? Any advice or experience you've had and would like to share will be greatly appreciated

 

Also, hypothetically speaking, is there a way to backup/sync "non-purchased" songs from my iPhone's Music app that I may or may not have obtained through a tweak like LinkTunes to iTunes on my laptop? Or would it self delete if I sync my iPhone? My laptop screen is getting replaced, so this is all in preparation once my designated laptop gets fixed.

Updated July 23, 2016 by Javi Tech

[Mrrocky 5k iPhone X]

i dont think the music will delete.