This is a common issue specific to iPhone users. You will need to do a special setting on your Personal Hotspot tab on your phone. Here, you can follow these steps:
- Open Setting and tap the Cellular menu
- Tap Cellular Data Network
- Fill in the following details on the bottom of the Personal Hotspot menu:
- APN: Live.On
- Setup the username and password
- All good! Your Personal Hotspot can now be activated.