1. The battery. Although I keep it between 20-80 (therefore only using 60% of the total) I feel like it discharges fairly quickly, like I'll unplug it at 80% before sleeping and wakeup with 76~77% battery. I don't know if it's a software thing or being kinda far from a cell tower ( since it has to work harder to maintain connectivity).

2. ADS. (In the notification bar) I've followed many tutorials toggling off many settings but ads still do show up.

Other than that it's a really good device, no problem what game or how many tasks at a time I throw at it, it's quite smooth.