The Federal Bureau of Investigation (FBI) has issued a warning to smartphone users in the United States regarding the potential dangers posed by mobile applications developed by foreign companies, particularly those based in China. The FBI's alert highlights that many of these apps may collect sensitive user information such as location, contacts, and personal messages, raising significant data security concerns. Users are encouraged to carefully assess app permissions and developer details before downloading any applications. This warning is applicable to both Android and iOS devices, as officials note that even trusted platforms can host apps that may collect data without clear notification. The FBI's concerns are exacerbated by China's stringent security laws, which can require companies to provide user data to government authorities. Notably, Article 7 of these laws mandates that citizens and organizations support intelligence operations, while Article 14 allows for requests for cooperation from relevant entities. Although the FBI has not specified which apps are risky, popular applications such as CapCut, Temu, SHEIN, and Lemon8 are among those that may be affected. The risk is particularly pronounced for Android users due to the practice of sideloading apps, which involves installing applications from unofficial sources.