Comment by zippergz
5 years ago
I had this problem this week too. I have a secondary Gmail account that is forwarded to my main one. I tried to login to it, they demanded a phone number (even though I do have access to the backup email), and wouldn't let me in because the only number I have is one that's already in use on my main account. I guess now you need one unique fully-functional phone number for ever Google account you have?!
I think you can verify 6 Google accounts with a single number.
Hmm. I'm sure I don't have that many, and it told me I couldn't use that number, but maybe it was a temporary issue. I haven't tried again...