Take my HTC802t as an example. It has built-in NFC function. I changed an NFC-sim card in the mobile business hall. A card is divided into two functional areas, one is a mobile SIM card and the other is a bus card. There is no charge for changing cards. There is no monthly function fee. You can use the original SIM card and ID card. \x0d\ There is 10 yuan in the bus card. Turn on NFC, and you can swipe your card in the bus and subway without any settings. \x0d\ The simplest way to recharge is that the function of a smart card is the same as that of a smart card, which can be recharged at outlets. You can also register a card in your mobile wallet and set up a bound bank card to facilitate your recharge. \x0d\ and then there is the micropayment function. You need to set up a micropayment bank account in your mobile wallet, and you may need to open a corresponding function card in the corresponding bank.