diff --git a/src/Entity/Customer.php b/src/Entity/Customer.php
index c1cd86cd..10a131ea 100644
--- a/src/Entity/Customer.php
+++ b/src/Entity/Customer.php
@@ -116,6 +116,15 @@ class Customer
         return $this->numbers;
     }
 
+    public function getMobileNumberList()
+    {
+        $numbers = [];
+        foreach ($this->numbers as $number)
+            $numbers[] = $number->getID();
+
+        return $numbers;
+    }
+
     public function addMobileSession(MobileSession $session)
     {
         $this->sessions->add($session);