If you enter the wrong PIN more times than the maximum number of attempts allowed, the card will become “PUK-locked.” 
  
You need a Pin Unlock Key (PUK) code to restore access to 
		  HTC U19e. Contact your mobile operator for this code. 
		
 
- 
When prompted, enter the PUK code, and then tap 
			 Next. 
		  
- 
Enter the new PIN you want to use, and then tap 
			 Next. 
		  
- 
Enter the new PIN again, and then tap 
			 OK.