It’s been a while since I messed with Android. I recall never having much luck with deploying the game with UE4. I packaged the APK/OBB from the editor, copied them to my phone, and then used “APK Installer” to get it installed right. It’s worth trying so you can at least rule out the OBB being the problem. Oh, but now I recall using the batch file that gets generated with the APK/OBB and that worked fine too.