Important: You must set a lock screen PIN or password before installing a digital certificate. 
		
 
	  
 
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		  Save the certificate file in the root folder on 
			 HTC Desire 526G dual sim. 
		   
		
 
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		  Go to 
				Settings. 
			  
		
 
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		  Tap 
			 . 
		   
		
 
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		  Tap 
 and choose to install the certificate from the internal storage or SD card.
		  
		 
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		  If you have more than one certificate in the root folder, select the certificate you want to install. 
		   
		
 
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		  Enter a name for the certificate and tap 
			 OK.