The hidden features are amazing that is its safebox - you can hide videos apps and many more in the safebox
the phone also provide its cloud service which helps u to get your phone location in case if it is lost
now comming to the quality:-
-sound quality is perfect
-The camera quality of this phone is just amazing, and the best thing bout this phone is that it has front flash which make it easy to click selfies at night
-it has a classy look with round edges which is usefull for better grip
-the body of this phone is really strong
basically it is THE BEST PHONE IN ITS RANGE. if your budget is around 5k or 6k then you should go for INFOCUS M2