https://thenextweb.com/security/2020/08/12/tiktoks-older-version-collected-device-identification-data-violating-googles-app-store-policy/

TikTok has faced a lot of scrutiny for its data collection practices. It’s one of the many reasons why the app might get banned in the US. And a new privacy issue will not help its cause. The app’s older Android version collected MAC addresses of devices — a practice banned by Google.

An investigation from the Wall Street Journal revealed that the company gathered users’ device MAC addresses without informing them, or even Google. The report notes that the short video app collected this data for 15 months, up until last November when an app update was released.