diff --git a/scripts/calendar/check_calendar_customer_reminder.php b/scripts/calendar/check_calendar_customer_reminder.php
index 361ea8334..cf0d6b16f 100644
--- a/scripts/calendar/check_calendar_customer_reminder.php
+++ b/scripts/calendar/check_calendar_customer_reminder.php
@@ -35,6 +35,7 @@ foreach ($sendReminder as $reminder) {
     } else {
         $vm = "nachmittags";
     }
+
     $text = str_replace("[&&date&&]", date("d.m.Y", $reminder['start_time']), $calendarTemplate[0]->text);
     $text = str_replace("[&&start&&]", date("H:i", $reminder['start_time']), $text);
     $text = str_replace("[&&end&&]", date("H:i", $reminder['end_time']), $text);
@@ -42,6 +43,8 @@ foreach ($sendReminder as $reminder) {
     $reminderInfo = json_decode($reminder['customer_info_send'], true);
     $customerInfoType = $reminderInfo['customer_info_type'];
     $customerInfo = $reminderInfo['customer_info_type_text'];
+
+
     if ($customerInfoType == 1) {
         $body = $text;
         $email = new Emailnotification();
@@ -54,7 +57,20 @@ foreach ($sendReminder as $reminder) {
         $sms = new SmsNotification();
         $body = "Xinon Terminbestätigung:" . PHP_EOL . $text;
         $sms->setBody($body);
-        $sms->setRecipient($customerInfo);
+        $customerNumber = trim($customerInfo);
+        $customerNumber = str_replace(" ", "", $customerNumber);
+        $customerNumber = str_replace("(", "", $customerNumber);
+        $customerNumber = str_replace(")", "", $customerNumber);
+        $customerNumber = str_replace("-", "", $customerNumber);
+        $customerNumber = str_replace("/", "", $customerNumber);
+        $customerNumber = str_replace(".", "", $customerNumber);
+        $customerNumber = str_replace(",", "", $customerNumber);
+        $customerNumber = str_replace(";", "", $customerNumber);
+        $customerNumber = str_replace(":", "", $customerNumber);
+        if (preg_match('/^0/', $customerNumber)) {
+            $customerNumber = "+43" . substr($customerNumber, 1);
+        }
+        $sms->setRecipient($customerNumber);
         $sms->send();
     }
 }
\ No newline at end of file