1. The common problem is that the large back cover will resonate when the volume is turned on. At present, there is no solution. I think it is caused by the thin back cover.
2. It may have bugs that cause crashes. Remember to update the system as soon as possible. Currently, only a few phones have problems.
3. There is a small problem. The original mobile phone case cannot cover the largest main camera, and the main camera is still exposed. Just change the case.
4. Some mobile phones have WiFi disconnection problems. (I suggest to upgrade the system, the Bluetooth has also been broken, and it will be good to upgrade later)
5. Some software have some adaptation problems.
John Shen 
Sara Sara 
Gaosi Tai 
div