Field agents don't just need a secure phone — they need it to take a beating, too. Even if your idea of clandestine operations is more party planning than espionage, the DarkMatter Katim R01 has you covered. It runs a customized version of Android that ties into a hardware-based cryptosystem, with secure apps for voice, video, and email. A dedicated side button cuts off the mics and cameras for top-secret meetings, and the device keys will automatically delete should it detect forced physical tampering. None of this does any good if it breaks, of course, so its five-layer mil-spec case is resistant to drops, water immersion, and crushing while protecting a battery that ensures you don't run out of juice in the middle of a mission.