The GF Mastercard credit card can be used for payment by reporting the card number in the United States as follows:

1. Set a password on the card, but the limit is 10 overseas payment limit.

2. Open the overseas payment limit for credit cards through third-party payment channels such as WeChat, Alipay, and Cloud Flash.

3. Open third-party payment platforms such as WeChat, Alipay, and Cloud Flash, and click on the card in your credit card.

3. Enter your bank card number and mobile phone verification code. After logging in, you can automatically identify whether the card is bound.

4. After passing the verification, you can enter the mobile phone verification code and card number, and pay directly through the mobile phone verification code.