diff --git a/src/constants/error-messages.js b/src/constants/error-messages.js
index 39543b5f..244eefbc 100644
--- a/src/constants/error-messages.js
+++ b/src/constants/error-messages.js
@@ -33,7 +33,7 @@ const errorMessages = Object.freeze({
     VEHICLE_REQUIRED: 'Please select a vehicle',
     POLICY_NUMBER_REQUIRED: 'Please enter your policy number',
     POLICY_NUMBER_FORMAT: 'Please enter an alpha-numeric string',
-    PHONE_NUMBER_REQUIRED: 'Please enter phone number',
+    PHONE_NUMBER_REQUIRED: 'Please enter your phone number. The format must be ###-###-####',
     PHONE_NUMBER_FORMAT: 'Please enter your phone number. The format must be ###-###-####',
     POLICY_ZIP_REQUIRED: 'Please enter your policy ZIP',
     POLICY_ZIP_FORMAT: 'Please enter a valid ZIP',