Protect your personal information and prevent others from using
HTC Desire SV
without your permission by setting a screen lock pattern, PIN, or password.
You'll be asked to unlock the screen every time
HTC Desire SV is turned on or when it’s idle for a certain period of time.
Slide the Notifications panel open, and then tap
Select a screen lock option and set up the screen lock.
Lock phone after, then specify the idle time before the screen is locked.
Tip: You can also clear
Make pattern visible or
Make passwords visible if you don’t want your screen lock to display as you enter it onscreen.