According to the manufacturer, General Dynamics, the phone was
Developed for the National Security Agency’s Secure Mobile Environment Portable Electronic Device (SME PED) program, the Sectéra Edge is certified to protect wireless voice communications classified Top Secret and below as well as access e-mail and websites classified Secret and below.

It is military standard quality (see this
stress test video) and for sale only to U.S. security cleared purchasers. It runs Windows CE with a stylus and costs $3,350.
Unfortunately, unlike Guido’s Xperia™, it doesn’t come with a cameraphone…