A1 means it takes updates frequently i.e it is smart buy. It 4gb of ram and 64 gb of storage and its works smoothly while playing heavy games or doing works. It has dual rear cameras which works nicely its portrait mode is looking nice but not good as iphone 7 plus and onplust 5. Its battery 4 hour screen on time. Its screen is hd as compare to other phone at this price. It looks like iphone 7 plus in style. If you want to purchase android phone at price of 15000 it is smart buy.