Mobile phones may be open to a simple but devastating attack that enables a third party to eavesdrop on any phone conversation, receive any and all short-message service (SMS) messages. Attack would amount to the largest-ever breach of privacy for billions of mobile phone users across the world. But it remains uncertain exactly how easy and how widespread the problem could be thanks to a concerted effort by mobile operators to muddy the issue while they assess its extent. The official response of the mobile phone operators when asked about the threat is that the attack is phony.”]
Source: https://www.csoonline.com/article/2120809/mobile-phones-vulnerable-to-devastating-attack.html