Tutorial Downgrade to ios 10.2 from 10.3b1

[ammartaha93 106 iPhone 7 Plus 10.3.1]

that is my shsh file 
5450484370480_iPhone6,2_n53ap_10.2-14C92.shsh2

libzip not found... refer to this link and fix it: http://www.ipodhacks142.com/how-to-fix-prometheus-futurerestore-errors-and-frequently-asked-questions/

also can u show me your nonced SHSHs?

i already try this  fix  but not work will repeat and see

[CrypticIOS 0 11]

Do I have to have a 5s? Or can I do it with an iPhone 6s?

[Whitelabel 0 iPhone SE 11.2.5]

I am newbie, and want do jailbreak, I have Iphone 5s, 10.3.0 version, I understand need version 1.2.0, so can do this process for downgrade and jailbreak?

thanks!

EDIT: Sorry i missed tell Apple, dont firm 10.2.0 version this is my real problem, unknown :?

Updated June 4, 2017 by Whitelabel