u/Apart-Gas8709

i just founded my ios 7.1.1 shsh blob and i want to downgrade this phone to ios 7.1.1 using ios legacy kit. can someone make a tutorial for me step by step?

i want to downgrade my iphone 4s and i select my ipsw but this piece of shit says

[WARNING] Verifying IPSW failed. Your IPSW may be corrupted or incomplete. Make sure to download and select the correct IPSW.

[Input] Press Enter/Return to continue (or press Ctrl+C to cancel)

and i even downloaded the ipsw from ipsw downloader in Restore/Downgrade option

so how do i turn off this???

my iphone 4s on ios 9.3.6 feels laggy and made out of shit so i wanna downgrade this iphone to ios 5 but how?? i saw a tutorial on youtube from CertifiedLegacy but you need ios 7.1.2 to do that. so how can i downgrade my iphone 4s to ios 7 UNTETHERED

sorry for bad english this is not my first language

thank you