How do i Change/Update/Clear Credit Card Details information/Number of Android Phone Market Place

On your PC. Log in to Google Wallet (previously Google Checkout). Use the same Google/Gmail login you used for your android phone.
Go to Web:
You can delete, edit or add a new card here!

Google Wallet


To see your android phone Order (Applications downloaded) and Device settings go to Web:

Android Market

Hope this helps,

Have great purchase ^^