Using your file manager, navigate to: Internal Storage > Android > obb Create a folder named: com.activision.WaWZombie (Note: The exact name varies; check the modder's instructions). Place the .obb file inside that folder. It should not be in a sub-folder.
World at War’s Zombies is notable for: call of duty world at war zombies apk for android
Despite being unofficial, a well-made World at War Zombies APK delivers a remarkably faithful experience: Using your file manager, navigate to: Internal Storage
Open the app. If the loading screen appears, you have succeeded. If you see a black screen or a license check error, the OBB file is mismatched, or the APK is not the "Patched" version. Using your file manager