Blackphone

Blackphone is the world's most secure smartphone, launched in 2014 by Spanish cell phone maker GeeksPhone and communications encryption software developer SilentCircle, priced at $629. Blackphone uses a customized PrivatOS based on Android, and is equipped with a 16GB built-in storage device using NVIDIA Tegra 4i processor. The Blackphone's website supports Simplified Chinese and other languages.