Remember to swipe your credit card after (1) seconds to open the function, otherwise the second will not arrive.
(2) Keep the POS machine in a state of sufficient power, otherwise the Bluetooth of the POS machine cannot be searched.
③ Don't turn on Bluetooth pairing with POS machine in mobile phone settings.
④ Keep the mobile phone network unblocked, otherwise you can't swipe your card successfully.
⑤ If the single payment exceeds 10 yuan, the credit card seconds can only be reached after deducting the handling fee.
So much for the introduction on how to turn on Bluetooth of pos machine.