How does one find out whether a phone (the Sony Xperia M2 specifically) supports multiple channels? Perhaps all phones do? I haven't been able to find this information thus far, or I wouldn't have posted here.
All phones support multiple ANT channels, however there is an old ANT Android API which doesn't individually provide channels. If an app built with the older API is using ANT/ANT+, then no channels will be available for other apps.