Whether the machine in your hand is qualified to bind the card. Because Xiaomi Pay needs to support NFC function, only Xiaomi 5 has NFC function in Xiaomi's flagship mobile phone. At the same time, users need to upgrade the mobile phone operating system version to MIUI 8.0 and above to meet the above two basic requirements, which can be considered as a conditional binding of Mi pay.

If it fails, consider several points: 1, network reasons. Mi pay must be in a network environment to support binding. If your mobile phone signal is unstable, or there is no network and traffic, even if you open Xiaomi wallet, finding Xiaomi pay won't help, and you can't bind at all. 2. The system has not been upgraded. Xiaomi 5 mobile phone system is upgraded to MIUI 6.8.23 development version. After clicking "Bank Card" in the system APP Xiaomi Wallet, it will automatically jump to the interface of adding a bank card, otherwise it will naturally be impossible to bind the card. 3. The credit card information is wrong. When Xiaomi pay binds a credit card, it generally needs personal information such as security code, expiration date and mobile phone number. If you enter the wrong information, the binding is naturally unsuccessful. 4. No verification code has been received. When verifying the credit card, the bank will send you a short message with a verification code. Only by entering the correct verification code can the card be successfully tied.

MI Pay is an offline mobile payment function provided by Xiaomi Wallet. It uses a Xiaomi mobile phone supporting near field communication technology (NFC) to complete the payment transaction through a POS machine marked UnionPay China UnionPay Express.