When signing up for Google Voice, I accidentally logged in with the wrong Google Account. How can I transfer this number to a different account?
You will need to fill out the Troubleshooter for Account Transfer.
The process may take up to five (5) business days after which they will email you the outcome.
It will be easier if the new Google Account does not have a Google Voice number.
I logged into my other Google account then into Google Voice and claimed the same phone number.
The destination account that I wanted my cell phone number associated with did not have a number already attached to it. When I associated the destination account with my cell phone number it came back saying that it was already associated with a different account and would call to confirm that I had put in the correct information.
Google then called me to confirm that the number was correct and then automatically just transferred it.
After the confirmation it sent an e-mail to the incorrect account saying that my cell number was no longer associated with it and that was it.
No wait at all.