I usually cannot last 3 minutes in a game when playing on my Redmi note 4 phone. Server connection always lost. I cannot finish a tutorial. I tried playing the game outside my house juat in case in could be my internet connection but same thing happens. It is the stability of the server. I am from Malaysia and I tried playing on sever ip-normal - 1,2,3 and us-normal-3.
Try and contact the person who runs your wifi. If it is fixed and it still happens, report it to the owner.