diff --git a/app/Helpers/StringHelpers.php b/app/Helpers/StringHelpers.php
index a2db893..e4fc26c 100644
--- a/app/Helpers/StringHelpers.php
+++ b/app/Helpers/StringHelpers.php
@@ -72,3 +72,20 @@ function sanitizeIntegers(array $data, array $integerKeys = []): array
         return $data;
     }
 }
+
+if (! function_exists('formatPhoneNumber')) {
+    function formatPhoneNumber(string $number, string $prefix = '+62', bool $useDash = false): string
+    {
+        $clean = preg_replace('/\D+/', '', $number);
+
+        $clean = preg_replace('/^(0|62)/', '', $clean);
+
+        $formatted = $prefix.$clean;
+
+        if ($useDash) {
+            $formatted = preg_replace('/(\d{3})(\d{3,4})(\d{3,4})(\d+)?/', $prefix.'-$1-$2-$3$4', $formatted);
+        }
+
+        return $formatted;
+    }
+}