Global 2G and 3G network shutdowns drive security and infrastructure shifts

Telecommunications providers worldwide are progressively phasing out 2G and 3G networks to repurpose radio spectrum for 4G and 5G technologies. This transition aims to improve energy efficiency, increase bandwidth, and reduce operational costs for carriers such as Deutsche Telekom and Movistar.

However, the sunsetting of these older networks presents significant challenges. Many critical infrastructures, including emergency car systems and elevator panic buttons, rely on these legacy technologies and require hardware updates to avoid losing connectivity.

From a security perspective, 2G networks are highly vulnerable because they lack mutual authentication. Cybercriminals can use devices known as SMS Blasters or False Base Stations (FBS) to mimic legitimate towers, forcing nearby mobile devices to connect to them. This allows attackers to intercept communications and send fraudulent SMS messages that bypass carrier spam filters. To combat this, Google is introducing features in Android 17 that will allow operators to disable 2G by default, providing a 'zero click' layer of protection for users.