The DTEK50 from Blackberry is being touted as the most secure cell phone available anywhere. I rather doubt that claim as US military and civilian personnel use some very secure cell phones. Due to all the secrecy involved, I doubt if we will ever see a side-by-side comparison. However, I will concede that the Blackberry DTEK50 might be the most secure cell phone available for sale to civilians.
The device is up for preorder direct from BlackBerry for $299.99 starting now delivery expected on August 8th. It is sold unlocked and will be compatible with AT&T and T-Mobile in the US.
You can read more in an article at http://goo.gl/O4TXN9.