diff --git a/documentation/API_documentation/Device Identifier User Story.md b/documentation/API_documentation/Device Identifier User Story.md
index 39c9ca4..99720b0 100644
--- a/documentation/API_documentation/Device Identifier User Story.md
+++ b/documentation/API_documentation/Device Identifier User Story.md
@@ -2,7 +2,7 @@
| **Item** | **Details** |
| ---- | ------- |
-| ***Summary*** | As an application developer belonging to an enterprise, I want my application server to be able to request the identity of the mobile device (represented by the IMEI) currently being used by a given mobile network subscriber (identified by MSISDN, NAI or IP address). Optionally, I'd like to know the make and model of that device. |
+| ***Summary*** | As an application developer belonging to an enterprise, I want my application server to be able to request the identity of the mobile device (represented by the IMEI) currently being used by a given mobile network subscriber (identified by MSISDN, IP address or, when supported by network operators, a Network Access Identifier). Optionally, I'd like to know the make and model of that device. |
| ***Roles, Actors and Scope*** | **Roles:** Customer:User
**Actors:** Application Service Providers, Hyperscalers, Application Developers, End Users
**Scope:** *Order To Activate (OTA)* \- Retrieve device identifier details |
| ***Pre-Conditions*** |The preconditions are listed below:
- The Customer:BusinessManager and Customer:Administrator have been onboarded to the CSP's API platform.
- The Customer:BusinessManager has successfully subscribed to the Device Identifier product from the product catalog.
- The Customer:Administrator has onboarded the Customer:User to the platform.
- The Customer:BusinessManager has agreed to the terms and conditions of the CSP for managing consent of mobile subscription owners.
- The means to get the access token are known to the Customer:User to ensure secure access of the API.|
| ***Activities/Steps*** | **Starts when:** The Customer:User's application server makes a POST request to the Device Identifier API containing the end user's subscription information in the request body in order to retrieve the device identifier plus any optional device information.
**Ends when:** The Device Identifier API returns the requested information, or an error message |
@@ -13,7 +13,7 @@
| **Item** | **Details** |
| ---- | ------- |
-| ***Summary*** | As an application developer belonging to an enterprise, I want my application server to be able to request details about the type of the mobile device (represented by the Type Approval Code - TAC) currently being used by a given mobile network subscriber (identified by MSISDN, NAI or IP address). Optionally, I'd like to know the make and model of that device. |
+| ***Summary*** | As an application developer belonging to an enterprise, I want my application server to be able to request details about the type of the mobile device (represented by the Type Approval Code - TAC) currently being used by a given mobile network subscriber (identified by MSISDN, IP address or, when supported by network operators, a Network Access Identifier). Optionally, I'd like to know the make and model of that device. |
| ***Roles, Actors and Scope*** | **Roles:** Customer:User
**Actors:** Application Service Providers, Hyperscalers, Application Developers, End Users
**Scope:** *Order To Activate (OTA)* \- Retrieve device type details |
| ***Pre-Conditions*** |The preconditions are listed below:
- The Customer:BusinessManager and Customer:Administrator have been onboarded to the CSP's API platform.
- The Customer:BusinessManager has successfully subscribed to the Device Type product from the product catalog.
- The Customer:Administrator has onboarded the Customer:User to the platform.
- The Customer:BusinessManager has agreed to the terms and conditions of the CSP for managing consent of mobile subscription owners.
- The means to get the access token are known to the Customer:User to ensure secure access of the API.|
| ***Activities/Steps*** | **Starts when:** The Customer:User's application server makes a POST request to the Device Type API containing the end user's subscription information in the request body in order to retrieve the device TAC plus any optional device information.
**Ends when:** The Device Type API returns the requested information, or an error message |