I've been looking at the photo, and I think the description is incorrect. I don't think it's a cellphone. It looks to me like a 2-way radio.

I can't see any keypad, and it has what looks like a very small display, stubby antenna, and PTT switch on the side. It looks very much like the cheap Chinese FRS or GPRS radios you see in some import stores here in the 'States.

Some of those radios can be set up with squelch codes (similar to PL tones or CTCSS) so that a receiver won't break squelch unless a transmitter set to the same code uses the channel. That would be a fairly reliable short-range detonation mechanism, and it would explain why the Coalition jammers work without setting them off.

At any rate, it sure doesn't look like a cell phone to me.