I have the same setup with Cardo Freecom 4+ and an iPhone X. "Hey Siri" works about 25% of the time, and "Hey Cardo" works about 50% of the time. Seems like when you use one or the other successfully it will take several minutes for it to respond successfully again.
When "Hey Siri" works it is really nice but it is a crap shoot with current firmware.
Good luck.
When "Hey Siri" works it is really nice but it is a crap shoot with current firmware.
Good luck.