I have a Sprint Galaxy S5 Sport, and did the OTA update, then rooted. I tried the sqlite method of updating the settings.db but it would revert back to tether_dun_required = 1. I tried using adb "settings global tether_dun_required 0" but, that too resets back to 1 after turning on the hotspot. I have not tried xposed/x tether, since that does not work on stock, and must use CM12. I also tried the wifi tether router app, but that did not work. Anyone else have this issue, or any ideas on how to resolve it? Any help is greatly appreciated. Thank you!