Miui 8 To Miui 7

[redminote3]

I have kenzo, official unlock, zcx twrp. Now I am on latest eu weekly 6.11.3, I dont have any backup from LP, only now on MM.
What is the procedure to flash latest EU MIUI7 now?

I have tried before, flashing fastboot rom official LP, but radios didnt work (no wifi)

Can I just clean flash latest MIUI 7 weekly?