Hi
I have vocational school in 2 weeks and stay there in the dorm and had before my ps4.
Unfortunately, there's no Wi-Fi.
I have 4G reception there and have 10 GB of highspeed available.
Does anyone know if I can play online with it? For example fifa Fortnite gta
It depends on which provider you are and whether the network is heavily used in your area.
From my own experience I can say that I could play very well with Telekom via LTE or HSPA with a stable ping of around 30.
With E-Plus / O2 it was not possible for me to play satisfactorily since the ping fluctuated too often.