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diff --git a/libraries/GSM/GSM3ShieldV1PinManagement.h b/libraries/GSM/GSM3ShieldV1PinManagement.h
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+++ b/libraries/GSM/GSM3ShieldV1PinManagement.h
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+/*
+This file is part of the GSM3 communications library for Arduino
+-- Multi-transport communications platform
+-- Fully asynchronous
+-- Includes code for the Arduino-Telefonica GSM/GPRS Shield V1
+-- Voice calls
+-- SMS
+-- TCP/IP connections
+-- HTTP basic clients
+
+This library has been developed by Telefónica Digital - PDI -
+- Physical Internet Lab, as part as its collaboration with
+Arduino and the Open Hardware Community. 
+
+September-December 2012
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+The latest version of this library can always be found at
+https://github.com/BlueVia/Official-Arduino
+*/
+#ifndef _GSM3SHIELDV1PINMANAGEMENT_
+#define _GSM3SHIELDV1PINMANAGEMENT_
+
+#include <GSM3ShieldV1AccessProvider.h>
+#include <GSM3ShieldV1DirectModemProvider.h>
+
+class GSM3ShieldV1PinManagement
+{
+
+	private:
+	
+		GSM3ShieldV1AccessProvider gsm; // GSM access required for network register with PIN code     
+		GSM3ShieldV1DirectModemProvider modemAccess; 
+		bool pin_used; // determines if pin lock is activated 
+		
+	public:
+
+		/** Constructor */
+		GSM3ShieldV1PinManagement();
+		
+		/** Check modem response and restart it
+		 */
+		void begin();
+	
+		/** Check if PIN lock or PUK lock is activated
+			@return 0 if PIN lock is off, 1 if PIN lock is on, -1 if PUK lock is on, -2 if error exists
+		 */
+		int isPIN();
+		
+		/** Check if PIN code is correct and valid
+			@param pin			PIN code
+			@return 0 if is correct, -1 if is incorrect
+		 */
+		int checkPIN(String pin);
+		
+		/** Check if PUK code is correct and establish new PIN code
+			@param puk			PUK code
+			@param pin			New PIN code
+			@return 0 if successful, otherwise return -1
+		 */
+		int checkPUK(String puk, String pin);
+		
+		/** Change PIN code
+			@param old			Old PIN code
+			@param pin			New PIN code
+		 */
+		void changePIN(String old, String pin);
+		
+		/** Change PIN lock status
+			@param pin			PIN code
+		 */
+		void switchPIN(String pin);
+		
+		/** Check if modem was registered in GSM/GPRS network
+			@return 0 if modem was registered, 1 if modem was registered in roaming, -1 if error exists
+		 */
+		int checkReg();
+		
+		/** Return if PIN lock is used
+			@return true if PIN lock is used, otherwise, return false
+		 */
+		bool getPINUsed();
+		
+		/** Set PIN lock status
+			@param used			New PIN lock status
+		 */
+		void setPINUsed(bool used);
+};
+
+#endif;
+\ No newline at end of file