The phone doesnt lag at all. In fact, I'm actually using it. In the 8/512 ram/rom. How come yours lag? I think it's a fake. But if you know it's real, just make sure to turn on the ram expansion on the "storage" on the settin...
If phone have min 5000 Mah battery with 12/512 storage support then no doubt this phone will be very good, but still within 12 months I have not faced any lagging, camera quality is much better than Motorolla Edge 50 Pro. Its performance will be more...
The UI is very laggy, unoptimized mess that drops down to 15fps and stays there. For example, pressing the square button (app list) made this to occur. I'm not satisfied and is about to trade in with a used phone.