diff --git a/android/app/src/main/java/com/example/petstoremobile/utils/InputValidator.java b/android/app/src/main/java/com/example/petstoremobile/utils/InputValidator.java
index 0d45ad12..9ad2d5f4 100644
--- a/android/app/src/main/java/com/example/petstoremobile/utils/InputValidator.java
+++ b/android/app/src/main/java/com/example/petstoremobile/utils/InputValidator.java
@@ -100,13 +100,12 @@ public class InputValidator {
         return true;
     }
 
-    // Checks if the phone number is valid in (XXX) XXX-XXXX format
+    // Checks if the phone number is valid: XXX-XXX-XXXX, (XXX) XXX-XXXX, or XXXXXXXXXX
     public static boolean isValidPhone(EditText field) {
         String phone = field.getText().toString().trim();
-        // Matches (XXX) XXX-XXXX format
-        String pattern = "^\\(\\d{3}\\) \\d{3}-\\d{4}$";
+        String pattern = "^(\\(\\d{3}\\) \\d{3}-\\d{4}|\\d{3}-\\d{3}-\\d{4}|\\d{10})$";
         if (phone.isEmpty() || !phone.matches(pattern)) {
-            field.setError("Enter a valid phone number: (XXX) XXX-XXXX");
+            field.setError("Enter a valid phone number");
             field.requestFocus();
             return false;
         }