I’ve been thinking about this for a bit but I couldn’t come up with anything.

The idea is that you have a VOIP number and some self-hosted VOIP infrastructure connected to a landline phone. WhatsApp, Signal and voice traffic from other apps would be redirected to this landline phone instead of your mobile phone.

Is there a way to do this? How do I get started?

Reasoning: I can now keep my phone isolated, wrapped in a thick towel and inside a solid box to prevent it from eavesdropping on me inside my own house.

Please do not respond with messages like “you’re too paranoid”, it doesn’t help.

Thanks