By ANDREA HANLEY FOR DAILYMAIL.COM Published: 16:04 GMT, 16 January 2025 | Updated: 17:52 GMT, 16 January 2025 e-mail 287 shares 38 View comments e-mail Top +99Home 38 View comments An urgent warning has been issued to iPhone users over hidden settings that allow third-party apps and hackers to spy on their every move. The National Security Agency (NSA) advised users to adjust privacy 'Location Sharing' and disable advertising permissions for each app downloaded. Location sharing should be set to either not allow location data usage or only allow location data usage while using the app. Skip Ad The video player is currently playing an ad. This setting can 'reveal details about the number of users in a location, user and supply movements, daily routines (user and organizational), and can expose otherwise unknown associations between users and locations.' The NAS also stated that users should set privacy 'settings to limit ad tracking… Reset the advertising ID for the device on a regular basis. 'At a minimum, this should be on a weekly basis.' This can be done by adjusting privacy settings to limit ad tracking and by resetting the advertising ID for the device on a regular basis. Hackers can also use an individual's location to find others nearby, allowing them to see exactly what places they are visiting, how they are interacting with the area and the identity of smartphone owner. An urgent warning has been issued to iPhone users over hidden settings that allow third-party apps and hackers to spy on their every move + 3 View gallery An urgent warning has been issued to iPhone users over hidden settings that allow third-party apps and hackers to spy on their every move