I have two-step verification enabled on my Google Account, and I generated an application-specific password for my Android device (Infuse 4G with custom ROM in case that's relevant), and input it. After about a day, the "Sign-in error for [email protected]" notification appears and I have to generate a new password and input it again in order to use the account. Is this a known issue with two-step verification or is it just me doing something wrong?

  • I have been using two-step verification for nearly a year, and have not have any issues on my Droid Bionic (2.3.3) or Transformer Prime tablet (4.0.3).
    – TomG
    Commented May 7, 2012 at 2:14
  • You should only have to change your application-specific password if you change your main password.
    – TomG
    Commented May 7, 2012 at 2:15
  • I know that theoretically it should work fine. The problem is that the reality isn't exactly matching up with that. Commented May 7, 2012 at 2:25

1 Answer 1


This sounds very strange. I've generated a few app-specific passwords (which look like "abcd-efgh-ijkl-mnop") for a few devices and have never heard from them since. Google says: "Application-specific passwords do not expire"

On the other hand, main password, which has to be accompanied with security code ("12345") does expire quite quickly. Please, make sure you use 16-letter app specific passwords, not the main password with security code.

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