hakingstok What about a partnership with Pine64?
I don't know there stance about security, but I think they are worth mentioning/considering.
I had a Pinephone. The hardware broke after half a year, the touch stopped working, and I wasn't able to repair it myself. Maybe I was just unlucky. But either way the phone was hugely overpriced for what you got, the hardware was more of less standard hardware from 10 years ago, I couldn't even get it to play back HD resoluted video, and the battery would last like 4 hours at most of active usage, less if watching videos. The camera was so bad I would never have been able to show any photo I had taken with it to anyone, without feeling hugely embarrassing. Think standard budget laptop webcam quality, pretty much. As far as security goes, there were apparently no Secure Boot support at all what I could see, and no Secure Element or TPM or similar, or anything like that. I never saw them releasing any firmware updates. Sometimes I wonder if the firmware was even updatable at all. Security did simply not seem to be a design goal. They kind of clearly stated on their webpage where they sold their devices that the devices are only intended for open source enthusiasts and developers interested in making regular Linux on phone possible. Essentially saying they are not guaranteeing anything at all, not security or anything else.
I did like the design of the phones though. They just looked like any no-brand smartphone. Hardly anything anyone would take notice of. Exactly how a privacy focused phone should look IMO. But I would be surprised if Pine64 is up to or even interested in the challenge of making a phone at GrapheneOS' expected security level. I think they would just want to keep making "freedom phones".