

Gmail blog announced new feature "Recovering Password via SMS" officially, which allows you to recover your Google account password via your mobile phone.
In case if you forget your password for your Google account, you can receive password recovery code via sms to your mobile phone.
All you need to do is just sign in to manage accounts page and open change password recovery option, where you see an option SMS and click on add a mobile phone number as shown below picture.

Image Credit : Gmail Blog
For instance if you forget your password, enter your email address or Google account name in password assistance page. After entering your email address or account name you will receive password recovery code for your mobile phone and your secondary email.
