A report from the Electronic Frontier Foundation (EFF) highlights concerns about third-party software development kits (SDKs) in mobile applications collecting and sharing user location data with advertising companies, often without user consent. Many developers use these advertising SDKs for monetization, but their default settings allow for location data collection. This data is sent to advertising companies and location data brokers, which can misuse it in sensitive contexts. Users may unknowingly expose their location data when granting permissions to apps, as third-party SDKs can access this information without clear user awareness. The EFF identified several advertising SDKs, including InMobi, BidMachine, Verve’s HyBid, and Huawei’s Petal Ads, that collect and share location data by default. Developers are encouraged to review SDK settings to protect user privacy, and the EFF calls for regulatory scrutiny of data harvesting practices.