Canvas A1 is an Android One device.I bought it for as low as Rs4500( Around Oct-15) Its been a long time and so far this device has not disappointed me in terms of display, looks, battery, camera and performance.I got the 8gb version instead of 4gb.
Pros-Amazing display, Good Camera, Stock android, Fast, No lag, can run heavy games smoothly, looks good
Cons-Dont update ur device to android 6.0 atleast not now, because it has a major battery draining problem.it tends to take up about 50-70% of the battery over night.i rather recommend on staying up in Android 5.1 for now.