I’ve been using mi a1 since seven months now and it’s still not laggy. At first when it rolled out it had a few problems in it’s rom but as of now it’s one of the best phone I’ve ever used. I’m running android 8.1.0 ressurection remix, and I am really impressed by the battery backup it can produce. Now let’s talk the main feature of this device, the dual camera. I’m the fan of this device’s camera since day 1. Potrait mode images are really sharp and blur is really smooth around the person’s edges. Ending my review I have only one word, Great.