Redmi 1S, Redmi Note 4G, Redmi Note Prime are still running in very outdated android kitkat.Kindly Upgrade to Marshmallow. I reques xioami to reqruit more developers to work on android upgrades and fix bugs on miui versions.

I am using redmi 2 prime. I has installed lateast MIUI 8 Global Stable For Redmi 2 Prime(2GB) V8.1.3.0.LHJMIDI. Still i have bug on it.
Have a look on http://en.miui.com/forum.php?mod ... p;page=1#pid8950190