The main issue I'm having with multiplayer.. I cant connect to any servers. Tried for a good 30 mins yesterday and kept getting "Connection to host failed" if the server wasnt full. The one time I did get in a server, I was booted 10 mins later with an error regarding connection to opponent.

My friend said he doesnt appear to have any issues connecting to multiplayer servers.. and if he invites me into his squad and he joins a server, it works fine. We played for 2 hours without any issues across 4 different servers yesterday.. yet when I try to join one of the servers on my own, it doesnt work?!

Its a strange bug, and its obviously not a problem at my end or I wouldnt be able to follow my friend into the games he joins.. What the hell?!

I get the same all the time, however I don't have anyone I know who plays this game so I don't know if it works with invite or not. But everytime I try to join a server, I got three responeses, Server is full, My serial number is already in use (which is not), or mostly Connection to the host failed.
Tried to use quick games, unranked matches first to learn the MP first, but it is impossible as well...no matter which gametype I try, I will be the only one in the session. I don't really think that noone else plays the game besides me...so WTF?
Ranked instant action seems to work (at least one mode lol...) but the other modes seems to be empty as well
My nat type says moderate, firewall is not blocking the game or anything, I don't really know what is the problem. Is it a provider problem maybe? Mine is O2 in UK.