I upgraded my iPhone se (the old one) from 12.2 to 13.6. The upgrade went ok and everything works fine as a handset. However, now my Bluetooth connection in my car is no good, the audio comes and goes every few seconds. I assume that is because my uconnect system in my dodge is too old for this update. Everything worked perfectly on 12.2.
I’m trying to downgrade to iOS 12.4 with an IPSW file from Macpaw.com. This must be an unsigned file because Apple is rejecting the update. Has anyone tried using third party software to install an unsigned IPSW? I trust the Mac paw file but I’m very skeptical of third party bootloaders and jailbreak solutions.
Any help would be appreciated.