So it's not possible at least on my device. I have updated it to iOS 15 (idk when it had jailbreak earlier but ok) and going backward to 14 isn't that straightforward especially when I don't have the SHSH blobs, so I've done tethered downgrade by https://sep.lol/ which threw some segfaults and finally when it downgraded and booted the device was stuck at Apple logo. So I don't mean that its bricked but again I rather mean that in current state it's not possible to boot kernel in PongoOS to install postmarketOS... Well at least I tried.

#ios #iphone7 #postmarketos #Checkra1n0 #jailbreak #linuxmobile #linuxphone