facing an ISP problem need a fix

[LOFTY2]

guys today my friend came to my house he has a different ISP and I have different ISP so hid ISP connected to the server and my ISP is still isn't able to connect to the server so can you guys give a fix for my issue

Game:BO2 MULTIPLAYER

I don't know how my ISP isn't able to connect to the server so please give a remedial fix

[Dss0]

LOFTY2 so you're in the same house but have two separate internet connections? What exactly happens when you try to connect to the server? Is the server hosted at home or on a vps?

[LOFTY2]

Dss0 no we live in different houses my ISP is jio and his ISP is bsnl.Whenever i click online in the game it gives this error

[Dss0]

LOFTY2 try changing your dns servers https://www.windowscentral.com/how-change-your-pcs-dns-settings-windows-10. Use 1.1.1.1 and 1.0.0.1 (cloudflare). Additionally make sure your system time is synced and the game can communicate through the windows firewall.
As a last resort try using a vpn.

[LOFTY2]

Dss0 Well a update for you so me and my father have same ISPs but different phones so his phone when I connected last night was able to resolve the problem and I was able to play but however with my phone I cannot play and the error comes up