Reason why Apple can't automatically add existing wiri
We need to set it up manually to connect automatically.
Find the wif you want to automatically connect in the Settings menu, and set it to automatically join, you can automatically connect to wifi.
1. Open the \"Settings\" menu button in the phone.
2. Click \"WLAN\" in the list item.
3. Turn on the WLAN switch.
4. After you find the name of the wireless network you want to connect to automatically, click the \"i\" exclamation mark on the right.
5, open the \"auto join\" switch, the iPhone will automatically connect to the wireless network.