After connecting the WiFi, you only need to enter the third-party payment platform and click the recharge to charge the phone bill. The way to connect to WiFi and charge the phone bill is to use a smart device. After connecting to WiFi, click the recharge function on the third-party platform such as Alipay or wechat on the smart device, and then find the phone bill recharge, enter the number and amount, and then charge the phone bill.