Karbonn sparke v is the android one device from google and I am using it from 2 years and works smoothly.the best you get is the direct updates from the google.ahead of all other smartphone manufactures.coming to spec the device provides the basic needed spec at good price the ram is 1 gb which is good for any kind of work like gaming and watching hd movies.and it is couples with mediatek 1.3 quad core processor which is quite good.provides tasks at good speed.
Display resolution is less as everything is not possible to be given at such price.but ita not worst.battery life is so less but with marshmallow it lasts long. The ui of the phone is awsome as it is the greatest and latest from google which you only get in necus devices which are far expensive.camera is fair.front as well as back.5 and 2 mp.and it is testified by google so does not lags with time.i use it as harsh can I but it still the same.hope to get more android one devices. The phone is really good as it is the personal review from my side.now the market is equipped with more awsome devives at such price.but you need to go for stock android at low price go for android one