Asus launched its Zenfone 2 (ZE551ML) series with 4GB of RAM in India in April starting at Rs. 19999. The Zenfone 2 is the successor of last year’s Zenfone 5 and Zenfone 6 smartphones, which were a huge success for the company. This time the company decided to launch the second-generation Zenfone smartphones as Zenfone 2 in several variants. Here we have the review of Zenfone (ZE551ML) with 4GB RAM that starts at Rs. 19,999. Is the smartphone worth the price? Let us find out in the complete review.