Whether you are an industry insider, won a code in a contest, or bought SOCOM 4 back in April, nobody is able to access matchmaking in the Resistance 3 beta. Attempts lead to a message saying "undefined," and as of now creating private matches is the only way to play online. Insomniac Games is aware of the issue and is currently working on an update, tweeting that an estimated time of arrival for a patch is "this week," hopefully sooner than later depending on "various factors."
Insomniac also tweeted that nothing will occur today, as they "can't get anything through format QA, staged or deployed through Sony on the weekend." Although this situations sucks, let's remember this is a beta and these instances are to be expected.
