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 the short code 386732. 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:
When the two-step authentication screen appears, click Enter a Passcode.
A blue bar appears at the bottom of the screen. Click Text me new codes in the bar.
Note: You will only be sent one seven-digit passcode.
A text message with a seven-digit passcode is sent to your device. The text in the blue bar at the bottom of the screen changes to confirm that you were sent a code.
Open the text message on your device to retrieve your passcode. The text message is sent from the short code 386732.
Enter the passcode in the box on the screen and click Log in.