Is it possible to redirect WhatsApp and Signal calls to a landline?
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.
You can bridge it through e.g. Twilio but it will add latency that makes the voice calls less pleasant. You're better off with a phone that has a microphone kill switch, or physically remove the microphones (hack the hardware) and only use an external mic. Or power down the phone altogether.
Hmm, do you think there's a way to have the ringing happen on the speakers but the conversation on the headphones? TBH if this is possible then I don't need to use such complicated measures
Not to argue about the privacy issue, but aren't there better options than a towel? Get a phone without camera? Get one of those phones with physical switches for sensors?
Get graphene OS and don't install anything but signal? I feel the towel wrapping is not the best solution for your privacy issue.
Yep. Look at something like the PinePhone. It has hardware switches that can disable camera, microphone and all types of wireless communication, respectively. And no need to degoogle, since it’s not googled in the first place (runs either Manjaro, PostmarketOS, Mobian or whatever you put on there yourself). Only drawbacks: it’s not really cheap for the specs and a little hard to find these days. But there are probably comparable devices out there.
Interesting concept. There's https://github.com/AsamK/signal-cli which specifically allows piping messages from Signal to another process, but at a glance its not clear if it allows for that with audio calls.
Might be easiest to just drill out the mic and camera, and use a usb headset for calls. I also suggest specific threat modelling and learning about opsec as that may help you feel more in control. After that, please look after your mental well-being. We all should.
Haven't had landlines in a long time but when I did I remember looking at cordless phones with Bluetooth to connect to your cell phone so you can answer both phones (cell phone and landline) on the handset. Beyond that look into pbx.