Make sure the OBB file is being pushed to the device. The install script that UE4 generates with the apk and obb should do this.
If your trying to go through the Play Store you need to set up your keystore. Check this:
Make sure the OBB file is being pushed to the device. The install script that UE4 generates with the apk and obb should do this.
If your trying to go through the Play Store you need to set up your keystore. Check this: