Mobile P2P Techniques

I am currently working on a p2p application that would be running on mobile devices or in a web browser. The problem is that I have some problems with current networks configurations that are keeping my app from working properly.

I wanted to know, what is the best solution to UDP-based communication between two peers. I tried UDP hole punching but it's not working that much. Also heard of STUN servers, but I don't understand how it can help me achieve mobile p2p.

If anyone knows modern techniques for p2p communications on mobile / web, I'd love to have a list of algorithms / protocols to look at !

Thanks !