How can I add a second device to a Google account to generate the one time password with?I have added my iPhone (with the Google Authenticator app) during the 2-step verification setup wizard but I also want to add my iPad.I can't see any options to add another device in my Google account 2-step verification section nor could I find any hints by searching the Google account help.
Google 2-step verification from 2 devices
google;multi factor auth
You can have multiple devices generate the same one time passwords by scanning the same QR code into both devices during the setup wizard.If you have already left the setup page you will have to generate a new QR code aka shared secret (Google won't display it again for security reasons).  Update: Make sure that the clocks of both devices are perfectly synced or one or possibly both devices will generate the wrong code.