Quote:
Originally Posted by Freshmaker
This worked perfectly! I was able to successfully downgrade my PW4 to 5.13.6 and it couldn't have been easier. Thanks so much for putting this together! 
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Actually downgrading a jailbroken pw4 can be done by just installing the diags firmware and then install the target one

but takes more time as you have to install firmware for 2 times though, so newer method is better I think.