The Librem laptops come with hardware killswitches. The aim is to do the same with the Librem 5. Kind of hard for governments to spy on you using a microphone, camera, etc... without electricity.
With the proposed design for the Librem 5, you can turn off the individual features of the phone without turning off the phone. So for example, you can turn off the camera (with a hardware switch, which is not something that can be overridden remotely) whilst still being able to browse the web. As far as I know there are no other modern phones with that feature.