iphone 7 downgrade?

[Wayne]

I have a iphone 7 gsm model is it possible to downgrade to ios 13 i have the shsh2 blobs?
If so how do i do it on a windows system?
Also how do i make a custom firmware on windows?

[meikatun]

I have a iphone 7 gsm model is it possible to downgrade to ios 13 i have the shsh2 blobs?
If so how do i do it on a windows system?
Also how do i make a custom firmware on windows?

You aren't longer able to download previous versions of IPSW, for any device

[flipped154]

Search succession downgrade .... but is tethered
No shsh blobs needs

[GeoSn0w]

I have a iphone 7 gsm model is it possible to downgrade to ios 13 i have the shsh2 blobs?
If so how do i do it on a windows system?
Also how do i make a custom firmware on windows?

iOS 13.0 you mean? You can only do tethered downgrade currently.