Qmobile Noir S6 runs Android marshmallow 6.0. UI is very light and close to the stock Andriod. That's why phone performs well in day to day tasks.
There are couple of additional features added by Qmobile in settings. Like you can swap on screen navigational buttons.
Guesters like double tap to wake or flip to mute are missing, but there are sliding gestures provided by Qmobile from which you can use double finger gestures on home screen. Sliding down opens phonebook while sliding up launches messaging app.
Qmobile phones usually comes with numbers of bloatware and this phone is not exception. There is Gameloft folder in which there are 4 games which can not be deleted without rooting your device and because these are only trial version so you can not play them either but you have option to disable them.
Some useful apps are also preinstalled on the phone, like Filemanager, AppManager, Facebook and WhatsApp.