Call of Duty sometimes works

try telling a friend online to invite u to a party then tell him what game to play

If your connection is very slow, it may take a while to fully download any new maps or updates. I'd suggest leaving it on overnight on the "downloading data" screen and see if it finishes the download by the next morning.

Go Online Screen Then Go Back To The Screen With All The Multiplayer Options, Leave It Like That For About 15 Minutes, Then Check It If It Hasn't Loaded Repeat All Of These Steps And It Will Work.(You Must After Going On The Downloading Game Settings Menu Go Back, Then Go Onto The Menu With The Create-A-Class Option And The Baracks, BUT DON'T CLICK FIND GAME GO BACK TO MULTIPLAYER OPTIONS MENU AND LEAVE FOR RECOMMENDED TIME. please rate :)

Hey buddy

have the same problem here all you have to do is disable the UPnP on BOTH the Ps3 and your router then it works again.

good luck
UPnP=( Universal Plug nd Play)

YOU mast restart ur router (hub) i will be fine

It should work after a long time if you traded because the settings are different on different disks

If you have a bad internet connection, try getting a better one.

1-turn off game console..............2-disconnect router for 20 seconds then reconnect............3-turn on game console..............4-go to setting click on network setting.................5-go to internet connection and press X and disable the connection wait 10 seconds and renable the connection and cod4 should work fine on line.............................
my sign name on playstation is red4n2ec0kreaper look me up if you need more help
it worked for me and should work for you

anything is possible, you should call/tell sony@ 954-345-7669

how to play online in call of duty 4