Launcher version does work, at least for most people. Something has gone wrong here, and we are trying to track it down 
At this point, best thing to do is to wipe everything from your phone, and your project’s Saved directory.
It’s possible that during time your SDK was messed up, state of things on your phone went bad, but I don’t really know.
You can get a File Manager program on your phone (like Astro), and delete directories on SD card. Look for your project names in root of SD card, and UE4Game.