The leading developer of GrapheneOS, the world's most secure smartphone operating system, was forcibly mobilized and sent to war This probably happened in Ukraine

GraphenEOS is an open source mobile operating system (OS). It is based on the Android Open Source Project and was originally created with a focus on user security and privacy. The OS can only be installed on Google Pixel phones and tablets. So far, only these devices meet GrapheneOS developers' hardware requirements and are promptly receiving fixes for identified vulnerabilities.