Server Still Unavailable

Every time I try to play Halo 4 online in any capacity it says server unavailable. I have tried playing on different connections at friends houses and such. I even reset my router and modem at home several times to hopefully fix the issue and nothing. I have read in different forums this is an issue but most seem to be fix including most on my friends list can play but I cant!!! I am at a loss on how to fix this issue so any advice or suggestions are greatly appreciated. thanks in advance.

Jason

Anyone have any advice???

I just started getting this issue as well. During a game, I lost connection and haven’t been able to access the regular servers since.