So Obi100 devices are not supposed to work with Google Voice.
I had a device connected to a fax machine for years. Decided to check if it still works. It does. Figured maybe it's working because it's been connected since forever. Went to ObiTalk dashboard, removed GV account, added another one. The device still works. Rebooted the device. Still works. Like a charm.
Why?
ModelName OBi100
HardwareVersion 2.8
SoftwareVersion 1.3.0 (Build: 2886)