Update concepts.md

Author: dbasantes

articles/communication-services/concepts/sms/concepts.md

@@ -64,19 +64,19 @@ To send SMS, you must have a sender ID—this can be a phone number or an alphan
 
 \* For detailed formatting requirements, see [Alphanumeric sender ID FAQ](./sms-faq.md#alphanumeric-sender-id) .
 
-## Sender Type Availability by Country 
+## Sender Type Availability by Country/Region
 
 > [!IMPORTANT]
 > **Sender geographic scope**
 >
-> SMS senders are **country-scoped**. A sender can deliver messages only within the country (or countries) for which it was provisioned, enabled, or approved.
+> SMS senders are **country/region-scoped**. A sender can deliver messages only within the country/region (or countries/regions) for which it was provisioned, enabled, or approved.
 >
 > - **Short Codes:**  
->   US Short Codes send SMS only to the **United States and Puerto Rico**. Short Codes in all other countries can send SMS **only within the country where they were obtained**.
+>   US Short Codes send SMS only to the **United States and Puerto Rico**. Short Codes in all other countries/region can send SMS **only within the country/region where they were obtained**.
 >
-> - **All other sender types** (Toll-Free numbers, 10-digit long codes, mobile numbers, and Alphanumeric Sender IDs) can send SMS **only to the countries where they are purchased, enabled, or registered**.
+> - **All other sender types** (Toll-Free numbers, 10-digit long codes, mobile numbers, and Alphanumeric Sender IDs) can send SMS **only to the countries/region where they are purchased, enabled, or registered**.
 >
-> Cross-country SMS delivery using a single sender is not supported. For multi-country messaging, you can use [Messaging Connect](../sms/messaging-connect.md).
+> Cross-country/region SMS delivery using a single sender is not supported. For multi-country messaging, you can use [Messaging Connect](../sms/messaging-connect.md).