The U.S. government has spent $ 17 billion on 50,000 signal jammer devices, including such outstanding names as Warlock Green, Warlock Red, Warlock Duke, Acorn, and more. But at the beginning of the war, the crossfire between mobile phone signal interceptors and improvised explosive devices was far below it. They are too slow to adapt well and can only provide protection within a few yards. Two jammers will lock on each other and cancel each other out every moment.
