Blackphone, Deutsche Telekom, Guardian Project

Silent Circle and Geeksphone have partnered to combine best-of-breed hardware with all the skills and experience necessary to offer BLACKPHONE, the world's first smartphone which prioritizes the user's privacy and control. Both sides of a call have to be using the same service to get full encryption.

http://youtu.be/WczXWirN9oo

Deutsche Telekom has already launched its SiMKo 3-Smartphone, an adapted version of Samsung's Galaxy, which encrypts e-mails, contact data, appointments, text messages, photos, audio recording and voice conversations.

The open-source Guardian Project is another service offering free applications for secure communication over smartphones and tablets.