Protect Your Gmail Account with a Password and Your Phone

                                          
With twostep verification  you can set up gmail to require a special code for login in addition to your password. The code comes through your phone.

To have Gmail ask you for a remembered password and a code sent to your mobile phone to log in for enhanced security:

• Click the gear in the top Gmail navigation bar..
• Select Account settings from the menu that comes up...
  • If you do not see a gear,,
  • follow the Settings link,,
  • go to the Accounts and Import tab and..
  • click Other Google Account settings...
• Now click Using 2-step verification under Security...
• If prompted enter your Gmail password under Password: and click Sign in..
• Click Set up 2-step verification..
• If you use an Android, BlackBerry or iOS device :-
  • Select your phone under Select a phone...
  • Install the Google Authenticator app on your phone..
  • Open the Google Authenticator app..
  • Select + in the application..
  • Select Scan Barcode..
  • Click Next » in your browser..
  • Focus the QR code on the web page with the phone's camera...
  • Click Next » in your browser again...
  • Enter the code that appeared in the Google Authenticator app for the email address you just added under Code..
  • Click Verify...
• If you use any other phone:
  • Select Other -Use another phone under Select a phone..
  • Enter your phone number under Add a mobile or landline phone number where Google can send codes....
  • Choose SMS text message if your phone can receive SMS messages or Automated voice message to have authentication codes read to you...
  • Click Send code...
  • Type the numerical Google verification code you received under Code..
  • Click Verify...
• Click Next » again...
• Click Next » once more....
• Now click Print codes to print offline verification codes that you can use to log in to your Gmail account when your phone is misplaced; keep the codes separately from the phone...
• Make sure Yes, I have a copy of my backup verification codes. is checked after you have written down or printed the offline verification codes.....
• Click Next »...
• Enter a backup phone number - a landline, for example, or a family member  phone - under You can have codes sent to your backup phone number if your primary phone is unavailable, lost, or stolen....
• Pick SMS text message if the phone can receive SMS messages or Automated voice message.
• If your backup phone and friend are handy, use (Optional) Test the phone to send an authentication code to it...
• Click Next »...
• If you have add-ons and applications access your Gmail account:..
  • Click Next »...
• Now click Turn on 2-step verification..
• Click OK under You are turning on 2-step verification for this account...
• Enter your Gmail address under Email..
• Type your Gmail password under Password..
• Click Sign in...
• Enter the verification code received under Enter code...
• Optionally, select Remember verification for this computer for 30 days., which will not have Gmail request new phone verification for a month...
• Click Verify...
• If you have add-ons and applications access your Gmail account, you may have to set up specific passwords for them:
  • Click Create passwords...
  • Set up passwords for applications that do not work with enhanced 2-step verification (such as email programs that access your Gmail account using POP or IMAP)...

Disable Two-Step Gmail Verification

To turn off enhanced two-step verification for your Gmail account;

• Click the gear in the top Gmail navigation bar and choose Mail settings or follow the Settings link in Gmail..
• Go to the Accounts and Import tab and..
• Click Other Google Account settings...
• Now click Using 2-step verification under Security..
• If prompted, enter your Gmail password under Password: and click Sign in...
• Click Turn off 2-step verification..….
• Now click OK...