Note: This is the standard method for games like GTA: San Andreas. Since BO4 doesn't exist, this is purely theoretical.
The definitive mobile experience, featuring maps and characters from across the Black Ops series. It is free-to-download and officially supported by Activision on Google Play. Call Of Duty Black Ops 4 Apk - Obb For Android
"Call of Duty: Black Ops 4" does not exist on Android. The search for an APK/OBB version is a trap set by scammers to exploit fans of the franchise. The only safe way to experience the franchise on mobile is through the official Call of Duty: Mobile application. Note: This is the standard method for games