In fact, if our mobile phone just wants to connect to WiFi, it does not need to insert any card, it does not need to insert memory card, and it does not need to insert mobile phone card.
Just open the WiFi switch of the mobile phone, enter the wlan to set up, enter the WiFi user name and password as required to connect to the WiFi network, you can achieve mobile Internet access. It doesn't need to be attached to any special software.