Phone doesn't allow me to play any multiplayer

Apr 30, 2018
1
0
10
Hello,
Ive recently change to a Huawei P smart. Phone is great. But it doesn't let me to play any multi-player game. Doesn't matter if game is in the phone or when I share hotspot to a computer.
I've been trying to play Pubg mobile. I can get inside the games menu and everything but the moment I start a game App says can't connect to the server.
If I share the 4g connection to my computer to play CSGO same. I can get to games menu but it fails to connect to a server to play.
Surfing is great and problem free as itself or in hotspot. And if I remove the SIM and put it in another phone I can play perfectly. So it is not a DNs ban from my cell company.
I've tried all options possible inside the phone. As it looks as a port blocking issue to me.
I'm not the smartest guy around with phones and networks. So, is there anyone that knows why is this happening? And how to fix it?
Its a Huawei P smart with Emui 8.0 and Oreo 8.0.
Cheers