![](https://lemmy.unknownsys.com/pictrs/image/2801594b-2962-4c82-b15f-d5e2e3641861.png)
![](https://sopuli.xyz/pictrs/image/8167d883-d9f5-4066-8ae7-80e8b3506722.webp)
Unless what you need is an IP phone, you also need a cellular modem that supports voice calls… plus a user interface for interacting with the said modem.
Windows 11 Subsystem for Android can’t help as passing through hardware and having the right Android kernel that has the right driver can be a nightmare.
P.S. I think it is more feasible to set up an IP-phone-to-cellular gateway, say, at your home. And call on your deck with IP phone dialing to the gateway. You can connect to cellular data service on your deck with some cheap 4G USB modem sticks. If you want 5G, the cost can be quite steep. Yeah when there is a will, there is always a way.
I am curious if you are using an external DAC or the built-in audio interface for your headphones.