New Navigation Buttons Light Problem

Apr 10, 2016

i bought this phone on Friday... i am satisfied but i would like to know if there is anything
that i can do to light up those buttons... i tried everything but light doesnt on... it is very
annoying in the dark because you cant see where are the buttons... i dont have any setting
in my phone to turn on buttons light... MIUI version is: 7.1 Stable ( LHPCNCK).
Android version: 5.1.1

Sorry for my English.

Thanks for replys.