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How to Authenticate with an SMS Text Message for Two-Step Authentication

If you select SMS as your authentication method, a text message with a seven-digit passcode is sent to your device. The SMS text message is sent from a 313 area code, and each passcode can be used only once.

Note: If you travel internationally and have SMS set as your two-step authentication method, the text messages you receive may incur substantial roaming charges.

The following devices support using  SMS text messages to verify your identity:

  1. When you try to access a site that requires two-step authentication,  click or tap Send SMS Message.

    choose to send a passcode as an SMS text message to your device
  2. A  text message with a seven-digit passcode is sent to your device. Open the text message and enter the passcode at the prompt.
    Note: The SMS text message is sent from a 313 area code.

    enter your passcode
  3. If you did not receive a text message after a couple of minutes, click or tap Send Another SMS Message.
Last modified September 27, 2016