Hello.
How to unlink your credit account from your Z3X card?

- On your client's card (to which the required credit account is attached), open Samsung or LG Tool
- Enter the login and password
- Click on the 'Link with card' button
- The tool will ask you as shown in the image below(pic 2).
- Click yes to detach login from client's card
You can now login to the account with other cards.