The Xiaomi Watch S3 has advanced technology that facilitates NFC payment capabilities. This feature allows you to conduct secure, contactless payments through the device conveniently. You can refer to https://www.mi.com/global/support/nfc-bank to view the supported countries/regions and bank card types.
If both your country/region and bank card type are listed above but you still can’t use the NFC payment function, please refer to the following:
1. Make sure that the software of the watch is updated to the latest version;
2. Please check the NFC settings to make sure that the NFC function of the Xiaomi Watch S3 is enabled and the payment function is set up correctly;
3. Make sure that your Visa or MasterCard bank card supports NFC payment and is compatible with the Xiaomi Watch S3. If your bank supports NFC payment, you can try to contact the bank customer service to confirm whether there are any restrictions;
4. Make sure that you have successfully added the Visa or MasterCard bank card in the NFC payment settings of the Xiaomi Watch S3;
5. After the above steps, you can try to restart the watch and the phone and try to pay again.