Method one
one
Click on personal hotspot
On your phone's Settings screen, select your personal hotspot.
two
Click WLAN Password
Once inside, find the WLAN password option on the page and click on it.
three
set a password
Set the password on the page and click Finish
Method 2
Set the screen Click [Personal Hotspot] to open the personal hotspot screen
Personal Hotspot screen Tap [WLAN Password] to open the WLAN password screen
Wireless LAN Password screen Enter 8 characters and click Finish to change the iPhone hotspot password