I'm not surprised that reception is worse than patchy, but even just the phone looking for a tower, or a wifi hotspot, would be enough to give away your position. All the more reason to keep it in airplane mode I suppose.
Are there any checks made to ensure the solders' private equipment is safe?
I can't go into specifics, but trust me.. the dude's cell phone wasn't emitting a signal that anyone could hear.
Adding signatures to message boards since October 7th, 2012.