Hi, thanks for making the plugin. I tried the app strictly "as-is" with my own api key.
Exported the app to Intel XDK, then ran the app on my phone and another on my laptop browser.
Nothing worked with phone's wifi turned off.
With wifi on I was able to send a text from the laptop client to the phone.
Haven't tried between laptops, but would most likely not consider making an app unless it works on mobile devices connected to cell network.
C2's MP plugin has a similar limitation where it works as an app on a phone but only when connected to wifi. Cell networks lets me fetch room names but not connect to another device.
Hope that feedback helps.