There are 2 phones that are pretty interesting. One is the Librem 5. I think it's $700 maybe? The other is the Pine phone. I believe it's closer to $250. Now

There are 2 phones that are pretty interesting. One is the Librem 5. I think it's $700 maybe? The other is the Pine phone. I believe it's closer to $250. Now from what I can tell these are both terrible phones. Really just terrible electronic devices. But they are devices that can connect to modern cell phone infrastructure and are fully open source. At least the Librem is. Not sure about the hardware on the pinephone. Librem is OSS down to the firmware. Wild. Not sure if I'm ready to make the jump just yet but a completely hackable phone is super appealing to me. Circling back to your original question, both companies seem to be shooting for the privacy angle with the phones. I've actually been seeing a lot of companies popping up lately in the privacy / open source space. It's pretty exciting.