Downgrading J710MN to Android 6.0.1 with specific security patch - Samsung Galaxy J7 Questions & Answers

Hello! Need help with something very important
I have a J710MN phone that I accidentaly upgraded to 7.0,but spoofing stuff became very uncomfortable for me (using joystick freezes a bit the game) (Pokemon GO). I flashed a 6.0.1 rom,but the security patch is 2 months after the one I had (February 2017) and spoofing is the same that before (in 7.0).
Problem 2 is that I can't find a Binary 4 rom with January 2017 security patch. I've tried lots of options (flashing roms,rooting,using boxes like Octopus) but no avail. Need help,please!

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Device: SM-920F
ROM Name: Stock
Android version: 7.0
Baseband version: G920FXXU5EQI4
Kernel version: 3.10.61-10958180 - [email protected] #1 - Sep 18 2017
Build number: NRD90M.G920FXXU5EQI6
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