Set up Instant Hotspot
Use Instant Hotspot with any Mac, iPhone, iPad, or iPod touch that meets the Continuity system requirements. It works when your devices are near each other and set up as follows:
Use Instant Hotspot
To connect to your Personal Hotspot from your Mac, click Wi-Fi in Control Center or the menu bar, then choose the name of the iPhone or iPad providing your Personal Hotspot .
To connect to your Personal Hotspot from another iPhone or iPad, go to Settings > Wi-Fi, then tap the name of the iPhone or iPad providing your Personal Hotspot .
If you're asked for a password when connecting, make sure that your devices are set up as described above.
The Wi-Fi status icon changes to the Personal Hotspot icon as long as your device remains connected to your Personal Hotspot.