Much as I'd like this to be true, it simply isn't. Your smartphone is more sophisticated than military comms equipment. It's been a running joke for years how bad the British Army's systems like Clansman are. Clansman for example was introduced in the 70s and is only just now being replaced by Bowman. (I used Clansman during the early 90s as a cadet). Think how fast mobile tech moves - can you imagine using a mobile phone 20 years old?

Soldiers serving in the former Yugoslavia in peacekeeping used their personal mobile phones to communicate - more reliable and more secure than the issued kit.