Also xterm and TokMe3HrsToSolveChallenge,nosense wrote I use LTE and it is very stable for gaming with ~80 ms ping
Thanks all for your suggestions.
Yes I guess 80ms is playable.
I used to have 5ms ping when I was living abroad. For Call of Duty, I think it made a difference.
I want to wait it out until I can get sub 10ms ping again.