Hey,u still have'nt resolved ur tethering? Here's how-
Install sqlite manager on ur phone. The sqlite app should be able to edit .db files. Then use root explorer and go to \data\data\com.android.providers.settings\database s Press on settings.db and open/edit using sqlite manager. Delete entry for tethering that says docomo.i think its line 30. Edit line that says tether_dun_required from 1 to 0. Close everything then reboot phone. Test wifi tethering.
Works 100% on my so-03D.
大意是使用 Root Explorer 開啟: /data/data/com.android.providers.settings/databases/settings.db