Update for feedback

Author: clairekinde11

src/content/docs/authenticate/authentication-methods/phone-authentication.mdx

@@ -8,7 +8,7 @@ relatedArticles:
   - 90f45d2e-cf59-4b5e-a26b-6dafd772e893
 ---
 
-SMS can also be included as a secondary factor if you have [multi-factor authentication](/authenticate/multi-factor-auth/about-multi-factor-authentication/) set up. 
+You can allow users to authenticate using their phone. This passwordless method lets users to receive a verification code via SMS. SMS can also be included as a secondary factor if you have [multi-factor authentication](/authenticate/multi-factor-auth/about-multi-factor-authentication/) set up. 
 
 <Aside>
 
@@ -22,6 +22,12 @@ This feature requires paid third-party services to use. Rates and limitations ap
 - You can register dedicated short codes or sender IDs in countries that have strict SMS sending regulations like Ireland, NZ and Canada, which will greatly improve deliverability.
 - Access to delivery logs and other service quality details for troubleshooting.
 
+## (Existing Twilio users only) Switch on SMS MFA
+
+1. In Kinde, go to **Settings > Environment > SMS**.
+2. Scroll to the bottom and switch on the **Use this service for SMS MFA** option.
+3. Select **Save**.
+
 ## SMS provider requirements (Twilio)
 
 SMS authentication requires the services of a messaging provider, in this case, [Twilio](https://www.twilio.com/en-us).
@@ -76,8 +82,7 @@ After you set this up, you can use SMS for both phone authentication and SMS MFA
 
    ![option to use kinde sms as fallback](https://imagedelivery.net/skPPZTHzSlcslvHjesZQcQ/9bdd2ef1-c308-4307-c84e-bc8ffdbfe200/public)
 
-7. Select the **Use this service for SMS MFA** option if you want to use Twilio for all SMS authentication, including MFA via SMS.
-8. Select **Save**.
+7. Select **Save**.
 
 ## Switch on phone authentication for an application