Fixing Thethering on Android – DUN Option is missing. admin Uncategorized October 3, 2016android tethering, APN type, apn type DUN option is missing., can't access the internet using tethering, missing DUN, tether, Tethering is not working, thethering stopped working after the upgrade Fixing Thethering on Android – DUN Option is missing. Does anyone know why APN Type doesn’t have DUN option. I can not use the tethering. So frustrating, someone please help!!!