The FBI has advised smartphone users to encrypt text messages, especially when communicating between Apple and Android devices, due to a cyber espionage campaign linked to hackers from the People's Republic of China. These hackers have targeted telecommunications infrastructure and stolen sensitive customer call records. Standard text messages between Apple and Android devices lack encryption, while messages between two devices of the same platform are secure. Users are encouraged to use secure messaging apps like WhatsApp and Signal, which provide end-to-end encryption. To use WhatsApp, users must download the app, accept terms, verify their phone number, and set up their profile. For Signal, users follow a similar process of downloading the app, verifying their phone number, creating a PIN, and setting up their profile. Both apps require Wi-Fi or cellular data for operation.