I'm referring to modern networks. 2G is deprecated and going bye bye very soon. For 3G/4G/LTE, the issue is the home cell sites host the keys and people exploi

I'm referring to modern networks. 2G is deprecated and going bye bye very soon. For 3G/4G/LTE, the issue is the home cell sites host the keys and people exploited those devices to create the DIY stingrays.