If you ever updated to Nougat you are on N modem.
You can't install any build, you need a version prepared for N modem.
Only these versions so far:
NucleaROM by Antariksh
First you have to know - after unlocking bootlader all your data & warranty will be deleted.
Download & copy to sd card: custom.zip, gapps.zip(7.1, arm64, mini f.e.), magisk/supersu(u can find here).
Unlock bootloader and flash twrp. Instruc...
This is my backup of reteu_24.107-58-13. Only for reteu users.
to restore with twrp.
Stock recovery img - flash with twrp or fastboot. Link:
OTA to 7.0, 25.200.15, RETLA DualSim.
Thanks to MikaruTakanori
If anyone has roote...
Just flashed last build.
News: I see the vulkan support.
Still with impulse governor. Will check others.
Gestures was better on 28.04.