Regarding more secure versions of Android, what are your (or anyone's) thoughts on the following? * CopperheadOS * OmniROM * PrivatOS, on Silent Circle Black

Regarding more secure versions of Android, what are your (or anyone's) thoughts on the following? * CopperheadOS * OmniROM * PrivatOS, on Silent Circle Blackphones AFAIK * The version on Blackberry Priv phones . I've also come across these, but don't know much about them: * Cryptogenmod: I'm not sure this project ever went anywhere * Chamelephon: http://chamelephon.com/ http://chamelephon.com/ * GuardianROM: Discontinued? * KeyROM by Mocana: Seems aimed at businesses that need secure Android. https://www.mocana.com/iot-security/keyrom https://www.mocana.com/iot-security/keyrom * Privacy phone by FreedomPOP: https://www.freedompop.com/theprivacyphone https://www.freedompop.com/theprivacyphone . And a couple probably not available to the public: * OK:Android by General Dynamics: http://gdmissionsystems.com/cyber/products/trusted-computing-cross-domain/microvisor-products/ http://gdmissionsystems.com/cyber/products/trusted-computing... * The OS on Boeing Black smartphones: http://www.boeing.com/defense/boeing-black/index.page http://www.boeing.com/defense/boeing-black/index.page