Just attempted jailbreaking iPhone 6 Plus from jailbroken iOS 8.1.2 to 9.3.3. PP and Cydia were installed, but Cydia crashes upon clicking. Re-jailbreaking with PP does not fix the issue. I don't know of any method to remove Cydia and re-jailbreak, aside from restoring my iPhone. Does anyone know how I can resolve this? It's been so long since I last performed a jailbreak that I don't remember how to restore while maintaining messages, emails, photos, etc., while simultaneously removing Cydia and all jailbreak data.
If I have to do a clean restore, is it possible for me to get my messages (SMS and MMS) back onto my phone? I don't think they get backed up by iCloud. If I were to restore from backup, I feel like I would run into the same problem with Cydia. Any suggestions?