I like that version of the story.
If the guy is dumb enough to use a phone, heck, why not send a missle his way ?
I'd suspect the different stories are to plant doubt in the back of the scumbag's minds.
The best I've ever heard of was the Israelis. They got a terrorist's "friend" to give him a cell phone. Next they called the terrorist and when he answered they confirmed it was him and a tiny explosive in the earpiece blew his brains out the far side of his head.
"Can you hear me now?"