* as you might see from my signature I have the Sennheiser MB Pro 1, which IIRC I bought from you, Lunis.

* the behavior you desribe is almost exactly what I DO NOT want

* Pressing the answer button to pick up the phone is not that bad

* Automatically switching back to my PC when I hang up is something I do not want.

* actually, what I want is to switch the headset to provide voice input to the phone without a phone call. And AFAICT simply pressing the answer button when there is not a phone call pending does not actually switch.

Who makes voice phone calls on their phone anymore?

The phone is a computing device. A peer computing device to the PC. I want to switch and fro symmetrically.

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Yeah, the cost of purchasing the dongle is probably why I haven't played with more PCs on my headset. Although I don't really have a need to connect my PC to more than one headset at a time, since I tend to use my second PC with my second Dragon license to do transcription.

but I would like to use my headset to provide voice input to my phone and iPad. And as far as I can tell the dongle is not an option for those. And also as far as I can tell there is no good way to switch when the phone is not actually receiving a phone call.

DPG15.6 (also DPI 15.3) + KB, Sennheiser MB Pro 1 UC ML, BTD 800 dongle, Windows 10 Pro, MS Surface Book 3, Intel Core i7-1065G7 CPU @ 1.3/1.5GHz (4 cores, 8 logical, GPU=NVIDIA Quadro RTX 3000 with Max-Q Design.