Has anyone actually successfully paired a Phantom helmet via bluetooth for comms with another unit? I've been unsuccessful so far with older Sena units and Cardo Spirit Single. Allegedly this is possible by using 'pair second phone' via the config menu, but every time I try the other unit immediately drops the connection. I've also failed using Mesh with other Sena units. This is turning out to be a really expensive way to listen to music when I ride.