"you can use a friend's number to request the code via text message or voice call. You don't have to worry about your friend's number being attached to your account. Google won't use this number for anything else besides account verification.
... If your country or carrier is not on our list of supported carriers, you might want to try a friend's phone on another carrier."
"I've seen it. It's rubbish." -- Marvin the Paranoid Android