Upgrading Xiaomi Mi 4 LTE-CT from kitkat to Marshmallow

Needed :

Miflash tool you can download here
fastboot rom MIUI 7 base marshmallow here
Mi pc suite for xiaomi driver
Data cable from xiaomi or whatever good data cable

Step by step :

-install miflash
-install mi pc suite

flashing step

-put your phone to fastboot mode. turn off your phone, then press and hold vol + and power button

-then connect your phone to PC/Laptop
-open miflash on your pc/laptop

-click browse and search your fastboot rom location
-choose flash all in bottom of miflash tool
-and click flash
-wait for few minutes
-if success, disconnect your phone from your pc/laptop
-enjoy your miui 7 marshmallow