To better safeguard our communications (and the privacy of those who communicate with us), AntiPolygraph.org is now using GrapheneOS (https://grapheneos.org/), a security hardened free and open source operating system based on the Android Open Source Project (AOSP).
Our adoption of GrapheneOS comes after a long period of careful consideration. It is noteworthy that in a November 2022 Twitter post (https://twitter.com/Snowden/status/1588472045960327168), in response to an inquiry regarding whether he trusted GrapheneOS, NSA whistleblower Edward Snowden stated: "I use GrapheneOS every day."
Now AntiPolygraph.org does, too. Our GrapheneOS mobile phone is the Android device that you will find registered (https://keybase.io/ap_org/devices) on our Keybase account.
AntiPolygraph.org also keeps an iOS device (kept in Lockdown Mode (https://support.apple.com/en-us/HT212650)) in order to be able to use Apple Messages and FaceTime, but our GrapheneOS device is our primary mobile device.
If you are also interested in GrapheneOS, this video by privacy advocate Naomi Brockwell may be helpful:
https://www.youtube.com/watch?v=Zo9qHqTDcgM