As DUOIT points out C2 MP plugin uses WebRTC. Providing that the platform your game runs on has WebRTC support then the MP will work. This can be researched by googling pretty easily.
For example google "CocoonJS WebRTC" and find no results where CJS has WebRTC. Meaning no CJS has no WebRTC support which means CJS can't be used with the plugin. However with enough searching you can find that Crosswalk does indeed support WebRTC and so Android through XWalk will work..... following that line there are no WebRTC IOS platforms.
Bandwidth is not related to a piece of mobile hardware. It is in fact releated to the ISP. If you think about it mobile often carries live voice streams and video. With that knowledge considering live voice will use more bandwidth than any game it's unlikely that mobile bandwidth is a problem.
Instead I would consider the problem related to mobile being the HOST. This is because a poorly written game doing MP hosting will only exlempify the current round of mobile performance complaints.