The lack of any information about the Hailstorm device is notable. Hailstorm is the version that can break 3G&#x2F;4G connections, supposedly. Breaking GSM is not anything remarkable because GSM was designed on the assumption that cell site simulators didn&#x27;t exist. But 3G authenticates the tower. Whatever Hailstorm is doing, it&#x27;s not just taking advantage of a missing design requirement, it&#x27;s actually subverting the crypto itself.<p>Unfortunately it seems there&#x27;s nearly nothing public about it.