Look into the Neo900 project. A lot of the current "secure" cell phone projects are really US-State plugs. The US Gov't is surprisingly transparent in it's funding. Just not opaque since it's kind of like a holographic sieve. Signal is one example of a Gov't backed and maintained project. Other things out there like LimeSDR recieve funding but maintain more autonomy.

Some people here want to talk to scholars, researchers, journalists, and/or friends/family in foreign countries about surveillance capitalism. Sometimes people want to speak to people who would otherwise be victims of reprisal if their state or their states' allies used the various tools Israel + US sells to hack + de-anonymize targeted individuals(i.e. students, journalists, lawyers, human rights wokers, etc#).