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My account had 2-step verification enabled and associated with the Authenticator App on my phone.

Yesterday I reformatted it and now I'm installing the apps again. Everything is setup but the Google Authenticator App looks for a barcode, and I cannot find in the 2-step verification steps. What I'd like to do is re-associate my account with the Google Authenticator App without turning off 2 step auth and back on again.

Any ideas?

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That's why you should always take data backup of Authenticator app using Titanium Backup... –  Sachin Shekhar Apr 1 '12 at 22:50
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2 Answers

up vote 1 down vote accepted

From what I can see, there is no way to re-associate a phone. It looks like your option is to disassociate/re-associate.

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I don't see an "add a phone" option? –  Matthew Read Apr 12 '11 at 13:40
    
Hmmm...I guess I mis-parsed the "add a backup" link. I'll edit my answer. –  Al E. Apr 12 '11 at 13:41
    
Ah, yeah. I experimented by trying to add the same phone as the backup, and of course it didn't work. –  Matthew Read Apr 12 '11 at 13:45
    
Since there were no other options, this is what I ended up doing. –  Luciano Apr 22 '11 at 16:18
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Edit: You can re-add the same phone by going to https://www.google.com/accounts/SmsAuthConfig and hitting the Edit link beside "Android" (the Mobile Application field). Oddly enough, this link didn't work for me in Chrome but it did in Internet Explorer.

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Would it? I've already logged into my account on the web browser of my computer. I'd understand if I were logged out and I'd need the authenticator code to login again (and a vicious circle). But if I'm able to turn off 2-step and turn it on again, the security is already bypassed. –  Luciano Apr 12 '11 at 13:33
    
@Luciano Your web log in has been verified via the two-step process already, though. Your phone cannot be re-verified via the two-step process since one of the steps no longer works. Your web login can safely turn off two-step since it was verified with two-step; that's not bypassing security at all. –  Matthew Read Apr 12 '11 at 13:35
    
Now that I think about it, since your web log-in has been double-checked it should be allowed to authenticate devices. I experimented further; my answer has been revised. Apologies for the confusion. –  Matthew Read Apr 12 '11 at 13:55
    
I couldn't do this. I ended up deassociating and reassociating the phone. Luckily it didn't erase my application-specific passwords. –  Luciano Apr 22 '11 at 16:17
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