Phil Zimmerman Launching Secure "Blackphone"
judgecorp writes "Famed cryptography activist Phil Zimmerman is set to launch Blackphone, a privacy-oriented phone which allows secure calls and messages. The phone is a joint venture between Zimmerman's Silent Circle communications provider and Geeksphone, the creator of the first Firefox phone, and will run PrivatOS, a secure version of Android. Zimmerman says the venture will be taking orders for the devices from February 24, after it is unveiled at Mobile World Congress in Barcelona."
Even if the phone is as secure as claimed, one of the biggest violations of privacy is the collection of location data. And no security feature on the device will prevent Verizon/AT&T/etc from knowing what tower it has contacted, or providing that to any agency it wishes to.
There are levels of communications that can be secured even with an hostile/insecure carrier. It can know where are you, but maybe not what you are sending and to who, (at least as pure data stream, if not as plain phone calls). Anyway, regarding hostile carriers or not, it should be safe against hostile/insecure sim cards too.