diff --git a/Managers/SmsManager.php b/Managers/SmsManager.php
index 2ae3152..8f26e3f 100644
--- a/Managers/SmsManager.php
+++ b/Managers/SmsManager.php
@@ -36,7 +36,7 @@ class SmsManager
      * @param string $message
      * @param null|string $fromName
      * @param int $status_report_req
-     * @return mixed
+     * @return SmsSendResponse
      */
     public function sendText($number,$message,$fromName=null,$status_report_req=0) {
         $fromName = $fromName!==null ? $fromName : $this->defaultFromName;
diff --git a/NexmoClient/Exceptions/UnroutableSmsMessageException.php b/NexmoClient/Exceptions/UnroutableSmsMessageException.php
new file mode 100644
index 0000000..facc46f
--- /dev/null
+++ b/NexmoClient/Exceptions/UnroutableSmsMessageException.php
@@ -0,0 +1,11 @@
+<?php
+namespace Jhg\NexmoBundle\NexmoClient\Exceptions;
+
+/**
+ * Class UnroutableSmsMessageException
+ * @package Jhg\NexmoBundle\NexmoClient\Exceptions
+ * @author Javi Hernández
+ */
+class UnroutableSmsMessageException extends \Exception {
+
+} 
\ No newline at end of file
diff --git a/NexmoClient/NexmoClient.php b/NexmoClient/NexmoClient.php
index 9012c53..3ce2bc0 100644
--- a/NexmoClient/NexmoClient.php
+++ b/NexmoClient/NexmoClient.php
@@ -1,6 +1,8 @@
 <?php
 namespace Jhg\NexmoBundle\NexmoClient;
 
+use Jhg\NexmoBundle\NexmoClient\Exceptions\UnroutableSmsMessageException;
+
 class NexmoClient {
 
     /**
@@ -99,7 +101,13 @@ class NexmoClient {
         $response = $this->jsonRequest('/sms/json',$params);
 
         if((int)$response['messages'][0]['status']!=0) {
-            throw new \Exception($response['messages'][0]['error-text']);
+            switch((int)$response['messages'][0]['status']) {
+                case 6:
+                    throw new UnroutableSmsMessageException();
+
+                default:
+                    throw new \Exception($response['messages'][0]['error-text']);
+            }
         }
 
         return $response['messages'][0];