To use OSC streaming with Muse Monitor, first make sure your phone is on the same Wifi network as your Mac/PC.
In Muse Monitor settings, enter the "OSC server IP" as the local network IP of your Mac/PC.
The you just have to run Muse Lab and press the streaming button in Muse Monitor. To make things easier, I have prepared this MuseLab config file which sets up all the visualizers and automatically starts listening on the default port UDP5000.
If you have any problems with streaming, the first thing to check is that both devices are on the same network. You should also note that some Universities and Work networks block UDP traffic, so if you have made sure your firewall is setup correct and are still getting no data though, check with your local IT staff that they are not blocking it!