This wikiHow teaches you how to see the passwords people use to connect their devices to your iPhone when it's set up as a personal hotspot.
Step

Step 1. Open the iPhone settings menu (“Settings”)
This menu is indicated by a gray gear icon on the home screen.

Step 2. Touch Cellular
This option is at the top of the “Settings” page.
If the iPhone is in UK English (British), touch “ Mobile Data ”.

Step 3. Touch Personal Hotspot
It's at the top of the “Cellular” page.

Step 4. Read the text to the right of the “Wi-Fi Password” option
The text is your personal hotspot password. By default, the text displayed is a random series of numbers and letters.