diff --git a/public/views/create.html b/public/views/create.html
index 982430718..f1340cb6b 100644
--- a/public/views/create.html
+++ b/public/views/create.html
@@ -117,7 +117,7 @@
               <switch id="network-name" name="isTestnet" ng-model="isTestnet" class="green right m5t m10b"></switch>
             </label>
 
-            <label for="seed" class="oh">
+            <label  ng-hide="hwLedger" for="seed" class="oh">
               <span translate>Specify your wallet seed</span>
               <switch id="seed" name="setSeed" ng-model="setSeed" class="green right m5t m10b"></switch>
             </label>
@@ -129,14 +129,14 @@
               </div>
             </label>
  
-            <label for="ext-master" class="m10t" ng-show="setSeed">
+            <label for="ext-master" class="m10t" ng-show="setSeed && !hwLedger">
               <span translate>Wallet Seed</span>
               <small translate>Enter the 12 words seed (BIP39)</small>
               <input id="ext-master"
               type="text"
               name="privateKey" ng-model="privateKey">
             </label>
-              <label for="passphrase" class="line-b oh" ng-show="setSeed"><span translate>Seed Passphrase</span>  <small translate>The seed could require a passphrase to be imported</small>
+              <label for="passphrase" class="line-b oh" ng-show="setSeed && !hwLedger"><span translate>Seed Passphrase</span>  <small translate>The seed could require a passphrase to be imported</small>
                 <div class="input">
                   <input type="text" class="form-control" name="passphrase" ng-model="passphrase">
                 </div>
@@ -155,11 +155,11 @@
 
 
 
-        <button type="submit" class="button round black expand m0" ng-show="totalCopayers != 1" ng-disabled="setupForm.$invalid || create.loading">
+        <button type="submit" class="button round black expand m0" ng-show="totalCopayers != 1" ng-disabled="setupForm.$invalid || create.loading || create.ledger">
           <span translate>Create {{requiredCopayers}}-of-{{totalCopayers}} wallet</span>
         </button>
         
-	<button type="submit" class="button round black expand m0" ng-show="totalCopayers == 1" ng-disabled="setupForm.$invalid || create.loading">
+	<button type="submit" class="button round black expand m0" ng-show="totalCopayers == 1" ng-disabled="setupForm.$invalid || create.loading || create.ledger">
           <span translate>Create new wallet</span>
         </button>
       </div>
diff --git a/public/views/preferences.html b/public/views/preferences.html
index b07c2dc35..2bdc0b71e 100644
--- a/public/views/preferences.html
+++ b/public/views/preferences.html
@@ -36,19 +36,18 @@
         <span ng-style="{'color':index.backgroundColor}">&block;</span>
       </span>      
     </li>
-
-    <li class="line-b p20"  ng-hide="preferences.externalIndex >= 0">
+    <li class="line-b p20" ng-hide="index.isPrivKeyExternal">
       <span translate>Request Password for Spending Funds</span>
       <switch id="network-name" name="encrypt" ng-model="encrypt" class="green right"></switch>
     </li>
-    <li class="line-b p20" ng-show="preferences.externalIndex >= 0">
+    <li class="line-b p20" ng-show="index.isPrivKeyExternal">
       <span translate>Hardware wallet</span>
       <span class="right text-gray">
         {{preferences.externalSource}} 
         (index {{preferences.externalIndex}})
       </span>
     </li>
-    <li class="line-b p20" ng-click="$root.go('backup')"  ng-show="preferences.externalIndex >= 0">
+    <li class="line-b p20" ng-click="$root.go('backup')"  ng-hide="index.isPrivKeyExternal">
       <i class="icon-arrow-right3 size-24 right text-gray"></i>  
       <span class="text-warning right" ng-show="index.needsBackup">
         <i class="fi-alert"></i> <span translate> Still not done</span>
diff --git a/public/views/walletHome.html b/public/views/walletHome.html
index c5772a71e..294a1cd8c 100644
--- a/public/views/walletHome.html
+++ b/public/views/walletHome.html
@@ -123,10 +123,9 @@
               {{(index.alias || index.walletName)}}
               </p>
               <div class="size-12 text-gray">
-                <span translate>Multisignature wallet</span> 
+                <span translate>Multisignature wallet</span>
                 (<span translate>{{index.m}}-of-{{index.n}}</span>)
-                <span ng-if="index.network != 'livenet'">- Testnet</span>
-                <span ng-if="!index.canSign"> - <span translate>No Private key</span></span>
+                <span ng-include="'views/includes/walletInfo.html'"></span>
               </div>
             </div>
             <div ng-show="!index.isShared">
@@ -134,8 +133,7 @@
               {{(index.alias || index.walletName)}}
               </p>
               <div class="size-12 text-gray">
-                <span ng-if="index.network != 'livenet'"> Testnet </span>
-                <span ng-if="!index.canSign" translate>No Private key</span>
+                <span ng-include="'views/includes/walletInfo.html'"></span>
               </div>
             </div>
           </div>
diff --git a/src/js/controllers/create.js b/src/js/controllers/create.js
index e77b4dd36..a210bf5e5 100644
--- a/src/js/controllers/create.js
+++ b/src/js/controllers/create.js
@@ -35,7 +35,7 @@ angular.module('copayApp.controllers').controller('createController',
       $scope.requiredCopayers = Math.min(parseInt(n / 2 + 1), maxReq);
     };
 
-    this.externalIndexValues = lodash.range(0,20);
+    this.externalIndexValues = lodash.range(0,ledger.MAX_SLOT);
     $scope.externalIndex = 0;
     this.TCValues = lodash.range(2, defaults.limits.totalCopayers + 1);
     $scope.totalCopayers = defaults.wallet.totalCopayers;
@@ -73,24 +73,17 @@ angular.module('copayApp.controllers').controller('createController',
         return;
       }
  
-      self.loading = true;
-
       if (form.hwLedger.$modelValue) {
         self.ledger = true;
-        ledger.getXPubKey($scope.externalIndex, function(data) {
+        ledger.getInfoForNewWallet($scope.externalIndex, function(err, lopts) {
           self.ledger = false;
-          if (data.success) {
+          if (err) {
+            self.error = err;
             $scope.$apply();
-            opts.extendedPublicKey = data.xpubkey;
-            opts.externalSource = 'ledger';
-            opts.externalIndex = $scope.externalIndex;
-            self._create(opts);
-          } else {
-            self.loading = false;
-            self.error = data.message;
-            $scope.$apply();
-            $log.debug(data.message);
+            return;
           }
+          opts = lodash.assign(lopts, opts);
+          self._create(opts);
         });
       } else {
         self._create(opts);
@@ -98,6 +91,7 @@ angular.module('copayApp.controllers').controller('createController',
     };
 
     this._create = function (opts) {
+      self.loading = true;
       $timeout(function() {
         profileService.createWallet(opts, function(err, secret, walletId) {
           self.loading = false;
@@ -105,14 +99,14 @@ angular.module('copayApp.controllers').controller('createController',
             if (err == "Error creating wallet" && opts.extendedPublicKey) {
               err = gettext("This xpub index is already used by another wallet. Please select another index.");
             }
-            $log.debug(err);
+            $log.warn(err);
             self.error = err;
             $timeout(function() {
               $rootScope.$apply();
             });
           }
           else {
-            if (opts.mnemonic && opts.n==1) {
+            if ( ( opts.mnemonic && opts.n==1) || otps.externalSource  ) {
               $rootScope.$emit('Local/WalletImported', walletId);
             } else {
               go.walletHome();
diff --git a/src/js/controllers/index.js b/src/js/controllers/index.js
index 72b62a98a..a1defdf67 100644
--- a/src/js/controllers/index.js
+++ b/src/js/controllers/index.js
@@ -101,6 +101,8 @@ angular.module('copayApp.controllers').controller('indexController', function($r
       self.walletId = fc.credentials.walletId;
       self.isComplete = fc.isComplete();
       self.canSign = fc.canSign();
+      self.isPrivKeyExternal = fc.isPrivKeyExternal();
+      self.externalSource = fc.getPrivKeyExternalSourceName();
       self.txps = [];
       self.copayers = [];
       self.updateColor();
diff --git a/src/js/controllers/join.js b/src/js/controllers/join.js
index 337db1446..9a66b61e2 100644
--- a/src/js/controllers/join.js
+++ b/src/js/controllers/join.js
@@ -204,7 +204,7 @@ angular.module('copayApp.controllers').controller('joinController',
           }
           $timeout(function() {
             var fc = profileService.focusedClient;
-            if (opts.mnemonic && fc.isComplete()) {
+            if ( ( opts.mnemonic || opts.externalSource )  && fc.isComplete()) {
               $rootScope.$emit('Local/WalletImported', fc.credentials.walletId);
             } else {
               go.walletHome();
diff --git a/src/js/controllers/walletHome.js b/src/js/controllers/walletHome.js
index 20f9948bf..fe6af8ef3 100644
--- a/src/js/controllers/walletHome.js
+++ b/src/js/controllers/walletHome.js
@@ -184,7 +184,7 @@ angular.module('copayApp.controllers').controller('walletHomeController', functi
       $scope.error = null;
       $scope.copayers = copayers
       $scope.copayerId = fc.credentials.copayerId;
-      $scope.canSign = fc.canSign();
+      $scope.canSign = fc.canSign() || fc.isPrivKeyExternal();
       $scope.loading = null;
       $scope.color = fc.backgroundColor;
 
@@ -244,7 +244,7 @@ angular.module('copayApp.controllers').controller('walletHomeController', functi
       $scope.sign = function(txp) {
         var fc = profileService.focusedClient;
 
-        if (!fc.canSign())
+        if (!fc.canSign() && !fc.isPrivKeyExternal())
           return;
 
         if (fc.isPrivKeyEncrypted()) {
@@ -801,7 +801,7 @@ angular.module('copayApp.controllers').controller('walletHomeController', functi
             return self.setSendError(err);
           }
 
-          if (!fc.canSign()) {
+          if (!fc.canSign() &&  !fc.isPrivKeyExternal()) {
             $log.info('No signing proposal: No private key')
             self.setOngoingProcess();
             self.resetForm();
diff --git a/src/js/services/ledger.js b/src/js/services/ledger.js
index 00c31542b..fa05bc8f6 100644
--- a/src/js/services/ledger.js
+++ b/src/js/services/ledger.js
@@ -1,53 +1,104 @@
 'use strict';
 
 angular.module('copayApp.services')
-  .factory('ledger', function(bwcService) {
+  .factory('ledger', function($log, bwcService, gettext) {
     var root = {};
     var LEDGER_CHROME_ID = "kkdpmhnladdopljabkgpacgpliggeeaf";
+    root.MAX_SLOT = 20;
+    root.ENTROPY_INDEX_START = 1000;
 
     root.callbacks = {};
 
     root.hasSession = function() {
-      root._message({ command:"has_session" });
+      root._message({
+        command: "has_session"
+      });
     }
 
-    root.getXPubKey = function(index, callback) {
-      root.callbacks["get_xpubkey"] = callback;
-      root._messageAfterSession({ command:"get_xpubkey", path:root._getPath(index) })
+    root.getEntropySource = function(index, callback) {
+      index = index + root.ENTROPY_INDEX_START;
+      var xpub = root.getXPubKey("m/" + index + "'", function(data) {
+        if (!data.success) {
+          $log.warn(data.message);
+          return callback(data);
+        }
+
+        var b = bwcService.getBitcore();
+        var x = b.HDPublicKey(data.xpubkey);
+        data.entropySource = x.publicKey.toString();
+        return callback(data);
+      });
     };
 
+    root.getXPubKeyForAddresses = function(index, callback) {
+      return root.getXPubKey(root._getPath(index), callback);
+    };
+
+    root.getXPubKey = function(path, callback) {
+      root.callbacks["get_xpubkey"] = callback;
+      root._messageAfterSession({
+        command: "get_xpubkey",
+        path: path
+      })
+    };
+
+
+    root.getInfoForNewWallet = function(slot, callback) {
+      var opts = {};
+      root.getEntropySource(slot, function(data) {
+        if (!data.success) {
+          $log.warn(data.message);
+          return callback(data.message);
+        }
+        opts.entropySource = data.entropySource;
+        root.getXPubKeyForAddresses(slot, function(data) {
+          if (!data.success) {
+            $log.warn(data.message);
+            return callback(data);
+          }
+          opts.extendedPublicKey = data.xpubkey;
+          opts.externalSource = 'ledger';
+          opts.externalIndex = slot;
+          return callback(null, opts);
+        });
+      });
+    };
+
+
     root.signTx = function(txp, index, callback) {
       root.callbacks["sign_p2sh"] = callback;
       var redeemScripts = [];
       var paths = [];
       var tx = bwcService.getUtils().buildTx(txp);
-      for (var i=0; i<tx.inputs.length; i++) {
+      for (var i = 0; i < tx.inputs.length; i++) {
         redeemScripts.push(new ByteString(tx.inputs[i].redeemScript.toBuffer().toString('hex'), GP.HEX).toString());
         paths.push(root._getPath(index) + txp.inputs[i].path.substring(1));
       }
       var splitTransaction = root._splitTransaction(new ByteString(tx.toString(), GP.HEX));
       var inputs = [];
-      for (var i=0; i<splitTransaction.inputs.length; i++) {
+      for (var i = 0; i < splitTransaction.inputs.length; i++) {
         var input = splitTransaction.inputs[i];
         inputs.push([
           root._reverseBytestring(input.prevout.bytes(0, 32)).toString(),
           root._reverseBytestring(input.prevout.bytes(32)).toString()
         ]);
       }
-      root._messageAfterSession({ 
-        command:"sign_p2sh", 
-        inputs: inputs, 
+      root._messageAfterSession({
+        command: "sign_p2sh",
+        inputs: inputs,
         scripts: redeemScripts,
-        outputs_number: splitTransaction.outputs.length, 
-        outputs_script: splitTransaction.outputScript.toString(), 
-        paths: paths });                   
+        outputs_number: splitTransaction.outputs.length,
+        outputs_script: splitTransaction.outputScript.toString(),
+        paths: paths
+      });
     }
 
     root._message = function(data) {
       chrome.runtime.sendMessage(
-        LEDGER_CHROME_ID, 
-        { request: data }, 
-        function(response) { 
+        LEDGER_CHROME_ID, {
+          request: data
+        },
+        function(response) {
           root._callback(response);
         }
       );
@@ -55,7 +106,9 @@ angular.module('copayApp.services')
 
     root._messageAfterSession = function(data) {
       root._after_session = data;
-      root._message({ command:"launch" });
+      root._message({
+        command: "launch"
+      });
       root._should_poll_session = true;
       root._do_poll_session();
     }
@@ -78,9 +131,12 @@ angular.module('copayApp.services')
         }
       } else {
         root._should_poll_session = false;
-        Object.keys(root.callbacks).forEach(function (key) { 
-          root.callbacks[key]({ success: false, message: "The Ledger Chrome application is not installed" });
-        });       
+        Object.keys(root.callbacks).forEach(function(key) {
+          root.callbacks[key]({
+            success: false,
+            message: gettext("The Ledger Chrome application is not installed"),
+          });
+        });
       }
     }
 
@@ -98,7 +154,7 @@ angular.module('copayApp.services')
       var varint = root._getVarint(transaction, offset);
       var numberInputs = varint[0];
       offset += varint[1];
-      for (var i=0; i<numberInputs; i++) {
+      for (var i = 0; i < numberInputs; i++) {
         var input = {};
         input['prevout'] = transaction.bytes(offset, 36);
         offset += 36;
@@ -109,12 +165,12 @@ angular.module('copayApp.services')
         input['sequence'] = transaction.bytes(offset, 4);
         offset += 4;
         inputs.push(input);
-      }   
+      }
       varint = root._getVarint(transaction, offset);
       var numberOutputs = varint[0];
       offset += varint[1];
       var outputStartOffset = offset;
-      for (var i=0; i<numberOutputs; i++) {
+      for (var i = 0; i < numberOutputs; i++) {
         var output = {};
         output['amount'] = transaction.bytes(offset, 8);
         offset += 8;
@@ -135,20 +191,20 @@ angular.module('copayApp.services')
 
     root._getVarint = function(data, offset) {
       if (data.byteAt(offset) < 0xfd) {
-        return [ data.byteAt(offset), 1 ];
+        return [data.byteAt(offset), 1];
       }
       if (data.byteAt(offset) == 0xfd) {
-        return [ ((data.byteAt(offset + 2) << 8) + data.byteAt(offset + 1)), 3 ];
+        return [((data.byteAt(offset + 2) << 8) + data.byteAt(offset + 1)), 3];
       }
       if (data.byteAt(offset) == 0xfe) {
-        return [ ((data.byteAt(offset + 4) << 24) + (data.byteAt(offset + 3) << 16) + 
-            (data.byteAt(offset + 2) << 8) + data.byteAt(offset + 1)), 5 ];
+        return [((data.byteAt(offset + 4) << 24) + (data.byteAt(offset + 3) << 16) +
+          (data.byteAt(offset + 2) << 8) + data.byteAt(offset + 1)), 5];
       }
     }
 
     root._reverseBytestring = function(x) {
       var res = "";
-      for (var i=x.length - 1; i>=0; i--) {
+      for (var i = x.length - 1; i >= 0; i--) {
         res += Convert.toHexByte(x.byteAt(i));
       }
       return new ByteString(res, GP.HEX);
@@ -157,7 +213,7 @@ angular.module('copayApp.services')
     return root;
   });
 
-var Convert = {}; 
+var Convert = {};
 
 /**
  * Convert a binary string to his hexadecimal representation
@@ -167,9 +223,11 @@ var Convert = {};
  */
 Convert.stringToHex = function(src) {
   var r = "";
-  var hexes = new Array ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
-  for (var i=0; i<src.length; i++) {r += hexes [src.charCodeAt(i) >> 4] + hexes [src.charCodeAt(i) & 0xf];}
-  return r; 
+  var hexes = new Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f");
+  for (var i = 0; i < src.length; i++) {
+    r += hexes[src.charCodeAt(i) >> 4] + hexes[src.charCodeAt(i) & 0xf];
+  }
+  return r;
 }
 
 /**
@@ -180,24 +238,24 @@ Convert.stringToHex = function(src) {
  * @throws {InvalidString} if the string isn't properly formatted
  */
 Convert.hexToBin = function(src) {
-   var result = "";
-   var digits = "0123456789ABCDEF";
-   if ((src.length % 2) != 0) {
-  throw "Invalid string";
-   }
-   src = src.toUpperCase();
-   for (var i=0; i<src.length; i+=2) {
-  var x1 = digits.indexOf(src.charAt(i));
-        if (x1 < 0) {
-    return "";
+  var result = "";
+  var digits = "0123456789ABCDEF";
+  if ((src.length % 2) != 0) {
+    throw "Invalid string";
   }
-  var x2 = digits.indexOf(src.charAt(i + 1));
-  if (x2 < 0) {
-    return "";
+  src = src.toUpperCase();
+  for (var i = 0; i < src.length; i += 2) {
+    var x1 = digits.indexOf(src.charAt(i));
+    if (x1 < 0) {
+      return "";
+    }
+    var x2 = digits.indexOf(src.charAt(i + 1));
+    if (x2 < 0) {
+      return "";
+    }
+    result += String.fromCharCode((x1 << 4) + x2);
   }
-  result += String.fromCharCode((x1 << 4) + x2);
-   }
-   return result;
+  return result;
 }
 
 /**
@@ -212,7 +270,7 @@ Convert.readHexDigit = function(data, offset) {
   if (typeof offset == "undefined") {
     offset = 0;
   }
-  return (digits.indexOf(data.substring(offset, offset + 1).toUpperCase()) << 4) + (digits.indexOf(data.substring(offset + 1, offset + 2).toUpperCase()));  
+  return (digits.indexOf(data.substring(offset, offset + 1).toUpperCase()) << 4) + (digits.indexOf(data.substring(offset + 1, offset + 2).toUpperCase()));
 }
 
 /**
@@ -266,7 +324,7 @@ Convert.toHexShort = function(number) {
  */
 Convert.toHexInt = function(number) {
   return Convert.toHexDigit((number >> 24) & 0xff) + Convert.toHexDigit((number >> 16) & 0xff) +
-       Convert.toHexDigit((number >> 8) & 0xff) + Convert.toHexDigit(number & 0xff);
+    Convert.toHexDigit((number >> 8) & 0xff) + Convert.toHexDigit(number & 0xff);
 }
 
 
@@ -275,209 +333,196 @@ GP.ASCII = 1;
 GP.HEX = 5;
 
 /**
-  * @class GPScript ByteString implementation
-  * @param {String} value initial value
-  * @param {HEX|ASCII} encoding encoding to use
-  * @property {Number} length length of the ByteString
-  * @constructs
-*/
+ * @class GPScript ByteString implementation
+ * @param {String} value initial value
+ * @param {HEX|ASCII} encoding encoding to use
+ * @property {Number} length length of the ByteString
+ * @constructs
+ */
 var ByteString = function(value, encoding) {
-    this.encoding = encoding;
-    this.hasBuffer = (typeof Buffer != 'undefined');
-    if (this.hasBuffer && (value instanceof Buffer)) {
-      this.value = value;
-      this.encoding = GP.HEX;     
+  this.encoding = encoding;
+  this.hasBuffer = (typeof Buffer != 'undefined');
+  if (this.hasBuffer && (value instanceof Buffer)) {
+    this.value = value;
+    this.encoding = GP.HEX;
+  } else {
+    switch (encoding) {
+      case GP.HEX:
+        if (!this.hasBuffer) {
+          this.value = Convert.hexToBin(value);
+        } else {
+          this.value = new Buffer(value, 'hex');
+        }
+        break;
+
+      case GP.ASCII:
+        if (!this.hasBuffer) {
+          this.value = value;
+        } else {
+          this.value = new Buffer(value, 'ascii');
+        }
+        break;
+
+      default:
+        throw "Invalid arguments";
     }
-    else {
-      switch(encoding) {
-        case GP.HEX:
-          if (!this.hasBuffer) {
-            this.value = Convert.hexToBin(value);
-          }
-          else {
-            this.value = new Buffer(value, 'hex'); 
-          }
-          break;
-      
-        case GP.ASCII:
-          if (!this.hasBuffer) {
-            this.value = value;
-          }
-          else {
-            this.value = new Buffer(value, 'ascii'); 
-          }
-          break;
-        
-        default:
-          throw "Invalid arguments"; 
-      }
-    }
-    this.length = this.value.length;
+  }
+  this.length = this.value.length;
 }
 
 /**
  * Retrieve the byte value at the given index
  * @param {Number} index index
  * @returns {Number} byte value
-*/
+ */
 ByteString.prototype.byteAt = function(index) {
-    if (arguments.length < 1) {
-      throw "Argument missing";
-    }   
-    if (typeof index != "number") {
-      throw "Invalid index";
-    }   
-    if ((index < 0) || (index >= this.value.length)) {
-      throw "Invalid index offset";
-    }
-    if (!this.hasBuffer) {
-      return Convert.readHexDigit(Convert.stringToHex(this.value.substring(index, index + 1)));
-    }
-    else {
-      return this.value[index];
-    }
+  if (arguments.length < 1) {
+    throw "Argument missing";
+  }
+  if (typeof index != "number") {
+    throw "Invalid index";
+  }
+  if ((index < 0) || (index >= this.value.length)) {
+    throw "Invalid index offset";
+  }
+  if (!this.hasBuffer) {
+    return Convert.readHexDigit(Convert.stringToHex(this.value.substring(index, index + 1)));
+  } else {
+    return this.value[index];
+  }
 }
-  
+
 /**
  * Retrieve a subset of the ByteString
  * @param {Number} offset offset to start at
  * @param {Number} [count] size of the target ByteString (default : use the remaining length)
- * @returns {ByteString} subset of the original ByteString 
-*/
+ * @returns {ByteString} subset of the original ByteString
+ */
 ByteString.prototype.bytes = function(offset, count) {
-    var result;
-    if (arguments.length < 1) {
-      throw "Argument missing";
-    }
-    if (typeof offset != "number") {
-      throw "Invalid offset";
-    }
-    //if ((offset < 0) || (offset >= this.value.length)) {
-    if (offset < 0) {
-      throw "Invalid offset";
-    }
-    if (typeof count == "number") {
-      if (count < 0) {
-        throw "Invalid count";
-      }
-      if (!this.hasBuffer) {
-        result = new ByteString(this.value.substring(offset, offset + count), GP.ASCII);
-      }
-      else {
-        result = new Buffer(count);
-        this.value.copy(result, 0, offset, offset + count);
-      }
-    }
-    else 
-    if (typeof count == "undefined") {
-      if (!this.hasBuffer) {
-        result = new ByteString(this.value.substring(offset), GP.ASCII);
-      }
-      else {
-        result = new Buffer(this.value.length - offset);
-        this.value.copy(result, 0, offset, this.value.length);
-      }
-    }
-    else {
+  var result;
+  if (arguments.length < 1) {
+    throw "Argument missing";
+  }
+  if (typeof offset != "number") {
+    throw "Invalid offset";
+  }
+  //if ((offset < 0) || (offset >= this.value.length)) {
+  if (offset < 0) {
+    throw "Invalid offset";
+  }
+  if (typeof count == "number") {
+    if (count < 0) {
       throw "Invalid count";
     }
     if (!this.hasBuffer) {
-      result.encoding = this.encoding;
-      return result;      
+      result = new ByteString(this.value.substring(offset, offset + count), GP.ASCII);
+    } else {
+      result = new Buffer(count);
+      this.value.copy(result, 0, offset, offset + count);
     }
-    else {
-      return new ByteString(result, GP.HEX);
+  } else
+  if (typeof count == "undefined") {
+    if (!this.hasBuffer) {
+      result = new ByteString(this.value.substring(offset), GP.ASCII);
+    } else {
+      result = new Buffer(this.value.length - offset);
+      this.value.copy(result, 0, offset, this.value.length);
     }
+  } else {
+    throw "Invalid count";
+  }
+  if (!this.hasBuffer) {
+    result.encoding = this.encoding;
+    return result;
+  } else {
+    return new ByteString(result, GP.HEX);
+  }
 }
 
 /**
  * Appends two ByteString
  * @param {ByteString} target ByteString to append
  * @returns {ByteString} result of the concatenation
-*/
+ */
 ByteString.prototype.concat = function(target) {
-    if (arguments.length < 1) {
-      throw "Not enough arguments";
-    }   
-    if (!(target instanceof ByteString)) {
-      throw "Invalid argument";
-    }
-    if (!this.hasBuffer) {
-      var result = this.value + target.value;
-      var x = new ByteString(result, GP.ASCII);
-      x.encoding = this.encoding;
-      return x;         
-    }
-    else {
-      var result = Buffer.concat([this.value, target.value]);
-      return new ByteString(result, GP.HEX);
-    }
+  if (arguments.length < 1) {
+    throw "Not enough arguments";
+  }
+  if (!(target instanceof ByteString)) {
+    throw "Invalid argument";
+  }
+  if (!this.hasBuffer) {
+    var result = this.value + target.value;
+    var x = new ByteString(result, GP.ASCII);
+    x.encoding = this.encoding;
+    return x;
+  } else {
+    var result = Buffer.concat([this.value, target.value]);
+    return new ByteString(result, GP.HEX);
+  }
 }
-  
+
 /**
  * Check if two ByteString are equal
  * @param {ByteString} target ByteString to check against
  * @returns {Boolean} true if the two ByteString are equal
-*/
+ */
 ByteString.prototype.equals = function(target) {
-    if (arguments.length < 1) {
-      throw "Not enough arguments";
-    }   
-    if (!(target instanceof ByteString)) {
-      throw "Invalid argument";
-    }
-    if (!this.hasBuffer) {
-      return (this.value == target.value);
-    }
-    else {
-      return Buffer.equals(this.value, target.value);
-    }
+  if (arguments.length < 1) {
+    throw "Not enough arguments";
+  }
+  if (!(target instanceof ByteString)) {
+    throw "Invalid argument";
+  }
+  if (!this.hasBuffer) {
+    return (this.value == target.value);
+  } else {
+    return Buffer.equals(this.value, target.value);
+  }
 }
-  
-  
+
+
 /**
  * Convert the ByteString to a String using the given encoding
  * @param {HEX|ASCII|UTF8|BASE64|CN} encoding encoding to use
  * @return {String} converted content
-*/
+ */
 ByteString.prototype.toString = function(encoding) {
-    var targetEncoding = this.encoding;
-    if (arguments.length >= 1) {
-      if (typeof encoding != "number") {
-        throw "Invalid encoding";
-      }
-      switch(encoding) {
-        case GP.HEX:
-        case GP.ASCII:
-          targetEncoding = encoding;
-          break;
-        
-        default:
-          throw "Unsupported arguments";
-      }
-      targetEncoding = encoding;
+  var targetEncoding = this.encoding;
+  if (arguments.length >= 1) {
+    if (typeof encoding != "number") {
+      throw "Invalid encoding";
     }
-    switch(targetEncoding) {
+    switch (encoding) {
       case GP.HEX:
-        if (!this.hasBuffer) {
-          return Convert.stringToHex(this.value);
-        }
-        else {
-          return this.value.toString('hex');
-        }
       case GP.ASCII:
-        if (!this.hasBuffer) {
-          return this.value;
-        }
-        else {
-          return this.value.toString();
-        }
+        targetEncoding = encoding;
+        break;
+
       default:
-        throw "Unsupported";
-    }   
+        throw "Unsupported arguments";
+    }
+    targetEncoding = encoding;
   }
-  
-ByteString.prototype.toStringIE =  function(encoding) {
+  switch (targetEncoding) {
+    case GP.HEX:
+      if (!this.hasBuffer) {
+        return Convert.stringToHex(this.value);
+      } else {
+        return this.value.toString('hex');
+      }
+    case GP.ASCII:
+      if (!this.hasBuffer) {
+        return this.value;
+      } else {
+        return this.value.toString();
+      }
+    default:
+      throw "Unsupported";
+  }
+}
+
+ByteString.prototype.toStringIE = function(encoding) {
   return this.toString(encoding);
 }
 
diff --git a/src/js/services/profileService.js b/src/js/services/profileService.js
index ef1ddd292..33a620a10 100644
--- a/src/js/services/profileService.js
+++ b/src/js/services/profileService.js
@@ -1,6 +1,6 @@
 'use strict';
 angular.module('copayApp.services')
-  .factory('profileService', function profileServiceFactory($rootScope, $location, $timeout, $filter, $log, lodash, storageService, bwcService, configService, notificationService, isChromeApp, isCordova, gettext, nodeWebkit, bwsError, ledger, uxLanguage) {
+  .factory('profileService', function profileServiceFactory($rootScope, $location, $timeout, $filter, $log, lodash, storageService, bwcService, configService, notificationService, isChromeApp, isCordova, gettext, nodeWebkit, bwsError, uxLanguage, ledger) {
 
     var root = {};
 
@@ -179,7 +179,7 @@ angular.module('copayApp.services')
         }
       } else if (opts.extendedPublicKey) {
         try {
-          walletClient.seedFromExternalWalletPublicKey(opts.extendedPublicKey, opts.externalSource, opts.externalIndex);
+          walletClient.seedFromExternalWalletPublicKey(opts.extendedPublicKey, opts.externalSource, opts.externalIndex, opts.entropySource);
         } catch (ex) {
           return cb(gettext('Could not create using the specified extended public key'));
         }