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The latest iOS update (11.1.1) bricked my iPhone, and it appears that I will need to reset the phone to factory settings and then restore from my (iTunes) backup. I have a fairly recent backup available, but by far the most important thing that I need to be sure will continue to work is my Google Authenticator codes.

I'm not changing devices, just reseting and restoring from backup to the same one. Will my Google Authenticator codes work if I restore my iPhone from a backup?

  • I'm not getting the point here. If the device is already erased, why aren't you restoring the backup and telling us if it worked? – bmike Nov 11 '17 at 16:47
  • @bike: I'm asking whether it's safe to erase it (using the usual method of reset and restore). It's bricked (frozen in setup and unresponsive to any other approach: reset, DFU, etc.) – orome Nov 11 '17 at 16:51
  • Aah - for sure - you're not going to need to get anything off it unless you want to spend some serious time and dollars to crack into the storage and try to decrypt. – bmike Nov 11 '17 at 16:56
  • @bmike: It worked fine. (Well "fine": Google came through but Apple is a disaster.) – orome Nov 11 '17 at 18:10
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Source:

According to this Google Community answer, you should be able to restore from iCloud and it will work.

If you back up your information using iCloud, you can restore your iPhone or iPad from iCloud, and you’ll be able to use the previous version of our Google Authenticator app.

  • 1
    Google (and only Google, really) came through. Is there a too for migration all of one's data to Google/Android? – orome Nov 11 '17 at 21:53
  • @orome I agree that this is disgraceful behaviour on Apple's part, but bear in mind that if something like this does happen on Android, the backup functionality is often much less than Apple provide. However, the pixel does provide excellent migration options - and if you backup your photos to Google Photos before moving your photos will all be "on" your pixel phone too. – Tim Nov 12 '17 at 1:35
  • @Tim: Good point. Migration and backup are very different things. The former will (I hope) increasingly become a legal requirement for firms that have a lot of user-created content; but the latter (storage on their servers in their formats) is really just a part of the lock-in business model that Apple follows. Fortunately governments are finally looking at this sort of thing as the monopolistic practice it is and will likely require easy one-click migration (that is, download or out-transfer in a standard, ideally human readable format) for all such data. – orome Nov 12 '17 at 13:51
  • @orome google do offer a nice export feature - I'm not sure about Apple. – Tim Nov 12 '17 at 13:52
  • @Tim: Yes, that's the different I was agreeing about. Google's business model is a bit different, so they have opted to provide export. Apple should be forced to do the same. – orome Nov 12 '17 at 13:59
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You can restore Google Authenticator with all accounts ONLY on the device where you activate this accounts(by scanning QR). Because this accounts tied to your device hardware.

My story:

I bought a new iPhone, made iTunes backup on my PC and fully reset and cleared all settings and content from the old one. After restore the backup on the new iPhone all accounts disappeared from Google Authenticator. But after I restored my old phone - all accounts restored as well.

  • thanks! I was sure I restored before but this time it didn't work and I didn't understand what's going on – A1m Jun 25 at 1:18
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For me, iOS 11.1 did not brick my phone. It made it unusable in a variety of amusing ways, but it didn't brick it.

The main issue I had was similar to yours - Google Authenticator had been completely wiped clean.

Thankfully, my iPhone backs up every night so I lost less than 1 days information (and no photos). This included restoring my Google Authenticator to a fully functional state - so the answer to your question is yes, your Google Authenticator information is stored in iCloud backups.

It also turned out that I had no recovery codes for my various accounts. I have 11 accounts in my Google Authenticator app - including Cloud Flare and Teamviewer. Neither of these apps have a backup 2FA method (like a text, a phone call or similar) - and Teamviewer do not offer any official support to free accounts. This meant I was locked out of my Teamviewer account permanently.

I can't stress this enough: ensure you have your backup codes stored somewhere - somewhere safe:

Personally I've put them in my password manager, but the Notes app on your iPhone is also perfect for this - or print them out and file them somewhere you won't forget. I'm also considering disabling 2FA login to Teamviewer.

  • You get your backup codes here, right? myaccount.google.com/security/signinoptions/… – sudo Feb 21 '18 at 2:41
  • This completely defeats the purpose of the 2FA (especially if your Notes are synced with iCloud). Having your recovery codes stored online is a very bad idea. – Montasar Jarraya Mar 12 at 16:43
  • @MontasarJarraya as with all of the backup, the codes are encrypted. – Tim Mar 12 at 16:44
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I was recently very stupid and forgot my iPad passcode, which meant after 10 attempts, the iPad was disabled and my only option was to restore the iPad from a recent iCloud backup. With great stress and apprehension, the device restored and on opening Google Authenticator, all of my 2FA codes were present and worked.

  • Please don't use answers to ask follow-up questions, post a new question using the "Ask Question" link on top right instead. – nohillside Jun 23 '18 at 11:37
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I have verified that you can retain all google authentication codes by restoring from Itunes. So both iCloud and Itunes backups will work successfully.

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At least currently, yes. I created an encrypted backup in iTunes, wiped my iPhone, and restored from that backup. I had my Google Authenticator codes on my phone again after the wipe. If your backup was not encrypted, I don't know if it would save the codes since it generally doesn't save passwords (in their vague wording).

This is only my experience. This is not documented anywhere, so proceed with caution. I only tried this after disabling 2FA on the sites I use it with.

  • I had heard elsewhere that this was the case however this did not work for me. iTunes Encrypted Backup, iPhone 6 w iOS12 to iPhone XS w iOS12 – Jay Oct 6 '18 at 6:05
  • Sigh. Ridiculous how non-user-friendly this is. – sudo Oct 6 '18 at 10:24
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Call me crazy, but I have a second device with Google Authenticator. When I scan a QR code for 2FA for a site, I do it on both my iPhone and the second device (the generated codes are identical on both devices).

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