This article explains how to set up and use Personal Hotspot with Instant Hotspot, along with information about how hotspots work and the requirements for using them. Instructions apply specifically to iOS 12, but should work with other recent iOS versions.
How to Set Up an iPhone Hotspot! (2022)
Once Personal Hotspot is enabled on your data plan, turn it on:
On the Home screen, tap Settings.
On the Settings screen, tap Personal Hotspot.
