The German company Nitrokey has announced its first smartphone, the NitroPhone 1. Billed as the world's safest Android smartphone, the NitroPhone 1 is nothing more than a Google Pixel 4a running a custom ROM for a lot of money.
https://www.notebookcheck.net/NitroPhone-1-The-safest-Android-smartphone-in-the-world-is-a-Google-Pixel-4a-with-a-third-party-ROM-installed.558391.0.html