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diff --git a/libraries/GSM/examples/Tools/PinManagement/PinManagement.ino b/libraries/GSM/examples/Tools/PinManagement/PinManagement.ino
new file mode 100644
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+++ b/libraries/GSM/examples/Tools/PinManagement/PinManagement.ino
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+/*
+ 
+ This example enables you to change or remove the PIN number of 
+ a SIM card inserted into a GSM shield.
+ 
+ Circuit:
+ * GSM shield
+ * SIM card
+ 
+ Created 12 Jun 2012
+ by David del Peral
+ 
+ This example code is part of the public domain 
+ 
+ http://arduino.cc/en/Tutorial/GSMToolsPinManagement
+ 
+ */
+
+// libraries
+#include <GSM.h>
+
+// pin manager object
+GSMPIN PINManager;
+
+// save input in serial by user
+String user_input = "";
+
+// authenticated with PIN code
+boolean auth = false;
+
+// serial monitor result messages
+String oktext = "OK";
+String errortext = "ERROR";
+
+void setup()
+{
+  // initialize serial communications and wait for port to open:
+  Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+  
+  Serial.println("Change PIN example\n");
+  PINManager.begin();
+  
+  // check if the SIM have pin lock
+  while(!auth){
+    int pin_query = PINManager.isPIN();
+    if(pin_query == 1)
+    {
+      // if SIM is locked, enter PIN code
+      Serial.print("Enter PIN code: ");
+      user_input = readSerial();
+      // check PIN code
+      if(PINManager.checkPIN(user_input) == 0)
+      {
+        auth = true;
+        PINManager.setPINUsed(true);
+        Serial.println(oktext);
+      }
+      else
+      {  
+        // if PIN code was incorrected
+        Serial.println("Incorrect PIN. Remember that you have 3 opportunities.");
+      }
+    }
+    else if(pin_query == -1)
+    {
+      // PIN code is locked, user must enter PUK code
+      Serial.println("PIN locked. Enter PUK code: ");
+      String puk = readSerial();
+      Serial.print("Now, enter a new PIN code: ");
+      user_input = readSerial();
+      // check PUK code
+      if(PINManager.checkPUK(puk, user_input) == 0)
+      {
+        auth = true;
+        PINManager.setPINUsed(true);
+        Serial.println(oktext);
+      }
+      else
+      {
+        // if PUK o the new PIN are incorrect
+        Serial.println("Incorrect PUK or invalid new PIN. Try again!.");
+      }
+    }
+    else if(pin_query == -2)
+    {
+      // the worst case, PIN and PUK are locked
+      Serial.println("PIN & PUK locked. Use PIN2/PUK2 in a mobile phone.");
+      while(true);
+    }
+    else
+    {
+      // SIM does not requires authetication 
+      Serial.println("No pin necessary.");
+      auth = true;
+    }
+  }
+  
+  // start GSM shield
+  Serial.print("Checking register in GSM network...");
+  if(PINManager.checkReg() == 0)
+    Serial.println(oktext);
+  // if you are connect by roaming
+  else if(PINManager.checkReg() == 1)
+    Serial.println("ROAMING " + oktext);  
+  else
+  {
+    // error connection
+    Serial.println(errortext);
+    while(true);
+  }
+}
+
+void loop()
+{
+  // Function loop implements pin management user menu
+  // Only if you SIM use pin lock, you can change PIN code
+  // user_op variables save user option
+  
+  Serial.println("Choose an option:\n1 - On/Off PIN.");
+  if(PINManager.getPINUsed())
+    Serial.println("2 - Change PIN.");
+  String user_op = readSerial();
+  if(user_op == "1")
+  {
+    Serial.println("Enter your PIN code:");
+    user_input = readSerial();
+    // activate/deactivate PIN lock
+    PINManager.switchPIN(user_input);
+  }
+  else if(user_op == "2" & PINManager.getPINUsed())
+  {
+    Serial.println("Enter your actual PIN code:");
+    String oldPIN = readSerial();
+    Serial.println("Now, enter your new PIN code:");
+    String newPIN = readSerial();
+    // change PIN
+    PINManager.changePIN(oldPIN, newPIN);
+  }
+  else
+  {
+    Serial.println("Incorrect option. Try again!.");
+  }
+  delay(1000);
+}
+
+/*
+  Read input serial
+ */
+String readSerial()
+{
+  String text = "";
+  while(1)
+  {
+    while (Serial.available() > 0)
+    {
+      char inChar = Serial.read();
+      if (inChar == '\n')
+      {
+        return text;
+      }
+      if(inChar!='\r')
+        text += inChar;
+    }
+  }
+}