First you have to open the hidden menu. To open the hidden menu go to your dial pad and dial 3845#*506#. it will open automatically. Scroll all the way to the bottom and open connectivity test. then you will see an option that says entitlement Enable/Disable. Uncheck this box and close out of the hidden menu. Now go to settings then wireless & networks then tethering and portable hotspot. check the option that says USB Tethering and check option below that says portable wifi hotspot. Go into the portable wifi hotspot settings and make sure portable wifi hotspot is checked. the option below that opens a menu that allows you to configure security. open it and put in a password for your wifi or select open. You can now use your Lg Thrive as a Wifi Hotspot or tether via USB. ENJOY!!!
If you dont know about a setting, research it or you risk making parts of your phone not functional. The hidden menu can be used to change things like UAstring, set fast dormancy, allow multiple pdp mode, change network mode, and others. this may work for other phones as well. to get into it on another phone dial 3845#*(your model number(should be 3 numbers) then #. the menu should open automatically. Im not sure of what phones this works on. but know it does work on phones similar to the Thrive. i will post the menus to go into to change other options as well. Hope this was helpful
USB and DUN Drivers: http://www.girlgeekette.net/2011/05/...d-dun-drivers/