I have setup my obi200 with google voice and everything works fantastic. I now want to port my mobile number to the google voice account and do away with the mobile. After I port the number to the google voice account do I need to do anything else for the ported phone number to work with the obi200? Thanks.
When you set up an OBi device to use Google Voice, you are actually just giving OBiTALK permission to access the Google Chat/XMPP service via your Google account credentials. It has no idea what your phone number was or is, after a port. So no, you don't need to do anything at all on the OBi side.
Instructions: http://www.obihai.com/porttutorial