The asus is one of the best smartphone company in india it recently brought a new smartphone named as asus zenfone 3s max zc521tl with a superb sound quality and with a 16gb internal memory and with 3gb ram it is very easy to use . and there are many special features are added to it it is very reliable in its cost and the durability depends upon thuser of the smartphone the value of money is very correctand its one of the special feature is it is having the fingerprint lock system