Boeing, yes the Airline giant, has quietly passed in a FCC filing for a smartphone. Not just any smartphone, a self destructing one!
Here is an official description of the tech behind it:
The Boeing Black phone is manufactured as a sealed device both with epoxy around the casing and with screws, the heads of which are covered with tamper proof covering to identify attempted disassembly. Any attempt to break open the casing of the device would trigger functions that would delete the data and software contained within the device and make the device inoperable.