Google Wallet has an all new version and with the new version you have the ability to add your Visa, Discover, MasterCard or American express card to Google Wallet. This was not previously the case and Google have also announced another added security feature with the new Wallet. When you enter your password it is not stored on your phone's secure area but rather on highly secured Google servers. You can now add any Credit or Debit card to Google Wallet and use it to pay either online or offline.
How to add a credit or debit card to Google Wallet
1. You will need the latest version of the app on your Android phone, available here.
2. Select the add a credit or debit card icon to add any card.
3. Fill out all the required information and tap next when your done.
How to add a credit card or debit card to Google Wallet online
1. If you would rather add your card online and not from your phone.
2. Go to https://wallet.google.com/manage and add your card details.
3. Select payment methods and then Add Card or Account button on the top.
The next time you use your phone for purchases your card will show up as a payment option.
To add a particular card as the default payment card
1. Click on the select card button below the card
2. Once it's set as the default payment card a green icon should appear beside it and the text below it should read 'Selected Card'
The next time you pay via NFC using your phone this card should appear as the default payment card.
How to disable Google Wallet
This is something needed in case your phone gets stolen or lost. To disable Google Wallet go to https://wallet.google.com/manage and go to devices section to disable or remove.
Source: Google Android Blog