diff --git a/src/Controller/APIController.php b/src/Controller/APIController.php
index 8ed36c59..ede2db8d 100644
--- a/src/Controller/APIController.php
+++ b/src/Controller/APIController.php
@@ -346,7 +346,7 @@ class APIController extends Controller
             ->setConfirmed($this->session->isConfirmed());
 
         // update mobile phone of customer
-        $cust->setPhoneMobile(substr(2, $this->session->getPhoneNumber()));
+        $cust->setPhoneMobile(substr($this->session->getPhoneNumber(), 2));
 
         $em->flush();