Change Mobile / Wi-Fi Hotspot Password - HTC Desire® 612
From a Home screen, navigate: Apps > Settings > More.
Tap Mobile network sharing.
Tap Mobile Hotspot.
Tap the Password field then enter the preferred password.
If the field is greyed out, tap the switch to turn off Mobile Hotspot.
Password must be at least 8 characters.
The new password must be entered on the connecting device.