A1 means it takes updates frequently i.e it is smart buy. It 4gb of ram and 64 gb of storage and it's works smoothly while playing heavy games or doing works. It has dual rear cameras which works nicely it's portrait mode is looking nice but not good as iphone 7 plus and onplust 5. It's battery 4 hour screen on time. It's 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.
