CalyxOS instance of open-source software
CalyxOS is an operating system for smartphones based on Android with mostly free and open-source software.  It is produced by the Calyx Institute as part of its mission to "defend online privacy, security and accessibility."CalyxOS preserves the Android security model, using Android's Verified Boot system of cryptographic signing of the operating system, and running with a locked bootloader, partly thanks to an installer that guides the user through the process of unlocking and then re-locking the bootloader.History
The Calyx Institute annual reports state CalyxOS was publicly launched during their 2018-2019 fiscal year. Inspiration included Tails and Qubes OS, and goals were said to be "completely open source", removing proprietary Google tracking, and including apps Tor, Signal and CalyxVPN for increased privacy.CalyxOS supports Pixel phones Pixel 3 and newer. In April 2022, CalyxOS announced Android 12L for testing on Fairphone 4, and OnePlus 8T, 9, and 9 Pro. However, in May 2022, CalyxOS announced OnePlus builds were pulled because of a bootloader "relock issue". As of July 2022, according to CalyxOS the OnePlus relock issue had not been resolved.
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