I have been reading so many posts here about jailbreaking old firmware versions, downgrading firmware without blobs, etc and it’s all very good but nothing seems to answer a simple question that keeps popping into my head.
We all know that the SHSH blobs are unique to each device but are they unique to each firmware version too? … could you do a tethered jailbreak with firmware version 5.0 and save the blobs, then create custom firmware version 4.4.4 using those blobs to get an untethered jailbreak?