By hooking the ringing mechanisms of mobile phones up to a detonator, the resistance have been able to set off explosives on demand at with significantly less risk. Currently, mobile phones are a rarity in Iraq. However, with more mobile phones out there, it would provide resistance fighters with a near-exhaustable supply of advanced detonators.
As you might suspect, finding explosives to go along with the detonators isn't much of a problem over there...