The location of NFC function of credit card may be different depending on the specific credit card manufacturer, card issuer or mobile phone brand. Generally speaking, you can find the options of "NFC and Payment" or "Wireless and Network" in the "Settings" menu of your mobile phone, and find the related submenus such as "Credit Card" after entering. In these menus, you can turn on the NFC function of the credit card and make corresponding settings. If you still can't find the relevant setting options, it is recommended to consult the customer service staff of the mobile phone or credit card manufacturer for more detailed operating instructions.