Oculus / Mobbile VR cross platfom?

Im developing a VR tool where It would be amazing if I could integrate cross platform support between a VR set and a mobile phone using google cardboard or a gearVR. I already built my working tool as a mobile app, now I have to dive deep into multilayer functionality as I've never played around with this before.

Im really bad at looking stuff up and I was wondering If anyone has any nice guides on cross platform multiplayer, any technology or procedures I should be familiar with, or any basically any multiplayer guides.

For deeper insight unto what i want to accomplish. The person in the VR set (will be an oculus) will interact and control the setting, while a couple other people in the VR mobile devices are simply talking and observing.

 

The most popular options these days to seem to be either PUN (https://www.photonengine.com/en/pun) or Unity's built-in stack (https://docs.unity3d.com/Manual/UNet.html). It sounds like you know you're always going to be on the same LAN so some of the problems the community has had with Unity's matchmaking and NAT traversal won't get in your way.

 

Awesome, will look into it , do you have any experience with this? Would be nice to check in with someone if I hit any roadblocks...