The FBI has warned smartphone users against exchanging regular text messages between Android and iPhone devices due to vulnerabilities that can be exploited by hackers or third parties.
The warning comes in the wake of concerns about a cyber espionage campaign allegedly conducted by a Chinese hacking group known as "Salt Typhoon".
The group has been targeting US telecom networks, stealing data such as metadata and information on recipients.
To enhance security, the FBI advises users to switch to encrypted messaging apps like WhatsApp.