Set up your phone to detect your face or another trusted device before you can unlock the screen. 
	 
 
  
 
	 -  
		  From the 
				Home screen, tap 
				. 
			  
		
-  
		  Tap 
			 , and then select and set up a screen lock. 
		   
		   
			 This will be your backup screen lock method. 
			  
-  
		  On the 
			 Security screen, tap 
			 Smart Lock. 
		   
		
-  
		  Confirm your screen lock. 
		   
		
-  
		  Choose what you want your phone to detect before it unlocks. 
		   
		
-  
		  Follow the onscreen instructions. 
		   
		
-  
		  Tap 
			 Lock phone after, and then specify the idle time before the screen is locked. 
		   
		
To help make Smart Lock more reliable and more secure, you can train 
		
HTC Desire 626s to recognize your face in different situations, such as when you're wearing glasses or sporting a beard. 
		
Tap 
		  Smart Lock, confirm your screen lock, then tap 
		  . Follow the onscreen instructions.