to Install APK and OBB on your android
phone:
Place the APK file in your phone’s SDcard or
Internal memory (preferably external SDcard).
Browse your phone memory/external memory and
tap on the APK file.
Click ‘install’
Wait for the APK to install.
Do not run the application yet.
Copy the OBB folder to SDCard, ex: SDCARD/
Android/obb/
com.criticalforceentertainment.criticalops/
obb_filename*