mike, as far as I know, and I’m sure someone will offer a correction if this is not accurate, the ReSound TV Streamer 2 uses Bluetooth to send audio directly to the hearing aids but cannot use Bluetooth to connect to an iPhone or other transmitting device for sound playback.
I believe the audio coming out of the device (PC in this case, or AV receiver, Blu-Ray player, etc.) has to be connected to the audio input of the ReSound TV Streamer 2 with a digital audio cable, which today’s smartphones can’t do. (Maybe there’s a way to rig it with an adapter coming out of the charger port, as you can for hardwired mini headphones/earbuds; I don’t know.)
I can use a digital optical cable from my PC to make this connection. There’s also a coaxial digital cable input on the ReSound TV Streamer 2. The original ReSound TV Streamer (1), which no longer connects to newer ReSound aids like the Quattros, could use analog RCA L-R audio cables and maybe an analog stereo mini cable as well to make the audio connection between sending device and receiving streamer, but TV Streamer 2 needs a digital cable AFAIK.
The ReSound TV Streamer 2 sounds great to me with spoken dialogue on TV shows and computer audio; it’s a big help. But for music playback, if I want to connect via Bluetooth to a smartphone, as I said, I’d use not the TV Streamer 2 but Apple AirPods Pro 2 earbuds or other good-quality Bluetooth earbuds (oh, and without my aids in my ears) or with Bluetooth headphones with aids in… with the playback volume set relatively SOFTLY to preserve what little hearing I have left! Those all sound quite good with music played on my iPhone.
One reason music playback doesn’t sound so great with TV Streamer 2 is that if you tell the aids to use the sound from the TV Streamer, you can’t also set the Music program in the Smart 3D app; it’s one or the other. Music doesn’t sound as good to me without the Music program set, because then I’m getting hearing aid settings optimized for spoken voice.