o set up and turn on the mobile Wi-Fi hotspot on your iPhone, follow the steps below:
Call your carrier to select a tethering plan
From the home screeb, select Settings.
After selecting it, tap General.
Next tap Network.
Next hit, Personal Hotspot and Wi-Fi Password.
Enter in a password. This makes sure other devices can't connect to your network.
Slide the Personal Hotspot switch to on to make your iPhone now discoverable. Your phone will now be a hotspot.
Connect to the hotspot using your PC, Mac, or iPad.