https://nokiapoweruser.com/tango-firmware-wp7-5-refresh-update-lumia-710-and-800-to-get-tethering-finally-update-for-lumia-710-available-on-navifirm-now-for-many-countries/
Lumia 710 & 800 to get tethering finally with Tango firmware (WP7.5 refresh) update.Update for Lumia 710 available on Navifirm now for many countries.