In a series of alarming advisories, US officials, including the Attorney General of New York and the FBI, have issued urgent warnings about the dangers of traditional texting methods following significant hacks targeting telecom networks. Users of iPhone and Android devices are advised to stop using SMS for two-factor authentication, as these methods are no longer considered secure. The FBI has specifically cautioned against RCS messaging, emphasizing that encryption is essential for protecting communications amidst rising cyber threats. The Cybersecurity and Infrastructure Security Agency (CISA) encourages the adoption of end-to-end encrypted messaging apps, such as Signal, to enhance privacy and security. As cyber espionage tactics escalate, government agencies urge public officials and citizens alike to secure their mobile communications.