Google can send verification codes to your cell phone via text message. Your carrier's standard messaging rates may apply.
Add backup phone numbers so Google has another way to send you verification codes in case your main phone is unavailable.
Google can call your cell or landline phone with your verification code.
You can print or download one-time use backup codes for times when your phones are unavailable, such as when you travel.
The Google Authenticator app for Android, iPhone, or BlackBerry can generate verification codes. It even works when your device has no phone or data connectivity.
During sign-in, you can choose not to use 2-Step Verification again on your computer. We'll still ask for codes or Security Key on other computers.