I had Google Voice handling voice mail on my iPhone for years and one day it stopped working. I have tried to set it up again but can't get it working. What changed?
Solved! Go to Solution.
I fixed it by first making sure that I disabled call forward no answer, and call forward busy. You can do that by dialing *730, and then *740.
I then re-enabled them by dialing *735159664664, and then *745159664664. After doing this, my voicemails started going to Google Voice again.