diff --git a/src/locales/de.json b/src/locales/de.json
index ca4ca8b..f265f1d 100644
--- a/src/locales/de.json
+++ b/src/locales/de.json
@@ -19,6 +19,7 @@
     "e_mail_des_sponsors": "E-Mail des Sponsors",
     "error_requesting_the_login_link": "Fehler beim Anfordern des Login-Links...",
     "first_lap": "👏 erste Runde",
+    "hinweis": "Hinweis:",
     "i_accept": "Ich habe die ",
     "i_accept_end": "gelesen und akzeptiert.",
     "if_you_are_the_system_administrator_please_refer_to_the_official_product_documentation_readme_for_configuration_guidance": "Wenn Sie der Systemadministrator sind, finden Sie Konfigurationsanweisungen in der offiziellen Produktdokumentation / README.",
@@ -38,7 +39,7 @@
     "not_registered_yet": "Noch nicht registriert?",
     "organization": "Organisation",
     "ort": "Ort",
-    "phone_number": "Telefonnummer (international formatiert)",
+    "phone_number": "Telefonnummer",
     "please_provide_a_valid_zipcode": "Bitte geben Sie eine gültige Postleitzahl an...",
     "please_provide_valid_mail": "Bitte geben Sie eine gültige E-Mail Adresse an",
     "plz": "PLZ",
@@ -53,6 +54,7 @@
     },
     "register_now": "Jetzt registrieren!",
     "register_now_small": "Jetzt registrieren",
+    "registration_local_phone_nr": "Wenn Sie eine Telefonnummer ohne Vorwahl angeben, wird Sie als deutsche Telefonnummer gewertet",
     "registration_running": "Registrierung läuft...",
     "registrationcode": "Registrierungscode",
     "registrieren": "Registrieren",
diff --git a/src/locales/en.json b/src/locales/en.json
index 17a0cbc..403ac47 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -19,6 +19,7 @@
     "e_mail_des_sponsors": "E-Mail of the Sponsor",
     "error_requesting_the_login_link": "Error requesting the login link...",
     "first_lap": "👏 first lap",
+    "hinweis": "Note:",
     "i_accept": "I have read and accepted the ",
     "i_accept_end": "",
     "if_you_are_the_system_administrator_please_refer_to_the_official_product_documentation_readme_for_configuration_guidance": "If you are the system administrator, please refer to the official product documentation/ README for configuration guidance.",
@@ -38,7 +39,7 @@
     "not_registered_yet": "Not registered yet?",
     "organization": "Organization",
     "ort": "City",
-    "phone_number": "Phone Number (international format)",
+    "phone_number": "Phone Number",
     "please_provide_a_valid_zipcode": "Please provide a valid zipcode...",
     "please_provide_valid_mail": "Please provide a valid mail address.",
     "plz": "zipcode",
@@ -53,6 +54,7 @@
     },
     "register_now": "Register now!",
     "register_now_small": "Register now",
+    "registration_local_phone_nr": "If you enter a phone number without an country code, it will be treated as a German phone number",
     "registration_running": "registration is running...",
     "registrationcode": "Registration Code",
     "registrieren": "Register Now",
diff --git a/src/views/Register.vue b/src/views/Register.vue
index b95cb50..3c72e60 100644
--- a/src/views/Register.vue
+++ b/src/views/Register.vue
@@ -51,7 +51,7 @@
         {{ $t('buergerlauf') }}
       </p>
       <div class="mt-4">
-        <label for="first_name" class="block font-medium">
+        <label for="first_name" class="block font-medium mt-2">
           {{ $t("vorname") }}
           <span class="font-bold">*</span>
         </label>
@@ -73,7 +73,7 @@
             p-2
           " />
         <!--  -->
-        <label for="last_name" class="block font-medium">
+        <label for="last_name" class="block font-medium mt-2">
           {{ $t("nachname") }}
           <span class="font-bold">*</span>
         </label>
@@ -95,7 +95,7 @@
             p-2
           " />
         <!--  -->
-        <label for="email_address" class="block font-medium">
+        <label for="email_address" class="block font-medium mt-2">
           {{ $t("e_mail_adress") }}
           <span class="font-bold">*</span>
         </label>
@@ -120,9 +120,10 @@
           {{ $t("please_provide_valid_mail") }}
         </p>
         <!--  -->
-        <label for="phone" class="select-none block font-medium">{{
+        <label for="phone" class="block font-medium mt-2">{{
           $t("phone_number")
         }}</label>
+        <span class="leading-0"><b>{{ $t('hinweis') }}</b>{{ " " }}{{ $t('registration_local_phone_nr') }}</span>
         <input v-model="userdetails.phone" name="phone" id="phone" autocomplete="off"
           :placeholder="[[$t('phone_number')]]" type="text" :class="{
             'border-red-500':
@@ -160,7 +161,7 @@
           </div>
           <div v-if="provide_address === true" class="col-span-6">
             <div class="col-span-6">
-              <label for="street" class="block font-medium">
+              <label for="street" class="block font-medium mt-2">
                 {{ $t("strasse") }}
                 <span class="font-bold">*</span>
               </label>
@@ -183,7 +184,7 @@
                 " />
             </div>
             <div class="col-span-6">
-              <label for="address2" class="block font-medium">{{
+              <label for="address2" class="block font-medium mt-2">{{
                 $t("apartment_suite_etc")
               }}</label>
               <input v-model="userdetails.address.address2" type="text" name="address2"
@@ -202,7 +203,7 @@
                 " />
             </div>
             <div class="col-span-6 sm:col-span-6 lg:col-span-2">
-              <label for="city" class="block font-medium">
+              <label for="city" class="block font-medium mt-2">
                 {{ $t("ort") }}
                 <span class="font-bold">*</span>
               </label>
@@ -225,7 +226,7 @@
                 " />
             </div>
             <div class="col-span-6 sm:col-span-3 lg:col-span-2">
-              <label for="postal_code" class="block font-medium">
+              <label for="postal_code" class="block font-medium mt-2">
                 {{ $t("plz") }}
                 <span class="font-bold">*</span>
               </label>
@@ -348,17 +349,30 @@ let userdetails = ref({
   phone: "",
   address: { street: "", address2: "", city: "", zipcode: "" },
 });
+function formatPhoneNumber(phoneNumber, countryCode = "+49") {
+  // Remove all non-digit characters
+  const cleanedNumber = phoneNumber.replace(/\D/g, "");
+
+  // Check if the number starts with the country code
+  if (cleanedNumber.startsWith(countryCode.replace("+", ""))) {
+    return "+" + cleanedNumber; // already international
+  }
+
+  // Check if the number starts with 0
+  if (cleanedNumber.startsWith("0")) {
+    return countryCode + cleanedNumber.slice(1);
+  }
+
+  // If it doesn't start with 0 or the country code, assume it's a local number.
+  // In this case, prepend the country code.
+  return countryCode + cleanedNumber;
+}
 function isPhoneOkay() {
   if (userdetails.value.phone === "") {
     return true
   }
-  if (userdetails.value.phone.includes(" ")) {
-    return false
-  }
-  if (!userdetails.value.phone.includes("+")) {
-    return false
-  }
-  if (isMobilePhone(userdetails.value.phone)) {
+  const formattedNumber = formatPhoneNumber(userdetails.value.phone)
+  if (isMobilePhone(formattedNumber)) {
     return true
   }
   return false
@@ -400,7 +414,7 @@ function login() {
         address: {},
       };
       if (userdetails.value.phone !== "") {
-        postdata.phone = userdetails.value.phone
+        postdata.phone = formatPhoneNumber(userdetails.value.phone)
       }
       if (provide_address.value === true) {
         postdata.address = {