The Importance of Surveillance Over Mobile Phones

The functionality of eavesdropping to calls and even the surroundings of the phone were implemented since day one. It's a strict requirement for any operator like normal operator to provide means for the law enforcement to tap into phone calls, he says. But if you have a roaming account and you came from other countries, it's absolutely unclear how to try to tap into your phone because you need to leverage the operator that issued the ISIM which is not in home network.