diff --git a/bandwidth.yml b/bandwidth.yml
index fd39c5cb..52ceffd4 100644
--- a/bandwidth.yml
+++ b/bandwidth.yml
@@ -2962,7 +2962,7 @@ components:
         description:
           type: string
           description: A detailed description of the event described by the callback.
-          example: Message delivered to carrier.
+          example: Message delivered to handset.
         message:
           $ref: '#/components/schemas/statusCallbackMessage'
         errorCode:
@@ -3018,7 +3018,11 @@ components:
         - `message-sending` indicates that Bandwidth is sending the message to
         the upstream provider.
 
-        - `message-delivered` indicates that the message was successfully sent.
+        - `message-sent` indicates that the message has left the Bandwidth
+        network and is in transit to the provider.
+
+        - `message-delivered` indicates that the message was successfully
+        delivered to handset.
 
         - `message-failed` indicates that the message could not be sent to the
         intended recipient.
@@ -3027,6 +3031,7 @@ components:
         recipient.
       enum:
         - message-sending
+        - message-sent
         - message-delivered
         - message-failed
         - message-read
@@ -8712,12 +8717,33 @@ components:
           media:
             - https://dev.bandwidth.com/images/bandwidth-logo.png
           tag: your tag here
+    messageSentCallbackExample:
+      summary: An example of a message-sent callback body.
+      value:
+        time: '2024-06-25T18:42:36.979456Z'
+        type: message-sent
+        to: '+15554443333'
+        description: Message sent to carrier
+        message:
+          id: 1593110555875xo7watq5px6rbe5d
+          owner: '+15552221111'
+          applicationId: cfd4fb83-7531-4acc-b471-42d0bb76a65c
+          time: '2024-06-25T18:42:35.876906Z'
+          segmentCount: 1
+          direction: out
+          to:
+            - '+15554443333'
+          from: '+15552221111'
+          text: ''
+          media:
+            - https://dev.bandwidth.com/images/bandwidth-logo.png
+          tag: v2 lab
     smsMessageDeliveredCallbackExample:
       summary: An example of a sms message-delivered callback body.
       value:
         type: message-delivered
         time: '2024-09-14T18:20:11.160744Z'
-        description: Message delivered to carrier.
+        description: Message delivered to handset.
         to: '+12345678902'
         message:
           id: 14762070468292kw2fuqty55yp2b2
@@ -8735,7 +8761,7 @@ components:
       value:
         type: message-delivered
         time: '2024-09-14T18:20:24.160544Z'
-        description: Message delivered to carrier.
+        description: Message delivered to handset.
         to: '+12345678902'
         message:
           id: 14762070468292kw2fuqty55yp2b2
@@ -8755,7 +8781,7 @@ components:
       value:
         type: message-delivered
         time: '2024-09-14T18:20:17.160544Z'
-        description: Message delivered to carrier.
+        description: Message delivered to handset.
         to: '+12345678902'
         message:
           id: 14762070468292kw2fuqty55yp2b2
@@ -9787,7 +9813,7 @@ components:
               information regarding a message sent (MT)
 
               from your message-enabled Bandwidth telephone number.
-               <p>The payload type will be one of <code>message-sending</code>, <code>message-delivered</code>, <code>message-failed</code> or <code>message-read</code>.
+               <p>The payload type will be one of <code>message-sending</code>, <code>message-sent</code>, <code>message-delivered</code>, <code>message-failed</code> or <code>message-read</code>.
                <p>Note that <code>message-read</code> callbacks are pertinent only for RBM messages sent from the <code>/messages/multiChannel</code> endpoint.
               </p><p>Please visit <a
               href='/docs/messaging/webhooks/'>Webhooks</a></p>
@@ -9798,6 +9824,8 @@ components:
                 examples:
                   messageSendingCallback:
                     $ref: '#/components/examples/messageSendingCallbackExample'
+                  messageSentCallback:
+                    $ref: '#/components/examples/messageSentCallbackExample'
                   smsMessageDeliveredCallback:
                     $ref: '#/components/examples/smsMessageDeliveredCallbackExample'
                   mmsMessageDeliveredCallback:
diff --git a/docs/RbmActionBase.md b/docs/RbmActionBase.md
index 3a80e931..12bee534 100644
--- a/docs/RbmActionBase.md
+++ b/docs/RbmActionBase.md
@@ -16,7 +16,7 @@ require 'bandwidth-sdk'
 instance = Bandwidth::RbmActionBase.new(
   type: null,
   text: Hello world,
-  postback_data: [B@3c29f6be
+  postback_data: [B@5b3c11ce
 )
 ```
 
diff --git a/docs/RbmSuggestionResponse.md b/docs/RbmSuggestionResponse.md
index 17ef49f6..2686306c 100644
--- a/docs/RbmSuggestionResponse.md
+++ b/docs/RbmSuggestionResponse.md
@@ -15,7 +15,7 @@ require 'bandwidth-sdk'
 
 instance = Bandwidth::RbmSuggestionResponse.new(
   text: Yes, I would like to proceed,
-  postback_data: [B@3c29f6be,
+  postback_data: [B@5b3c11ce,
   paired_message_id: 1752697342534u24xerqdukke523x
 )
 ```
diff --git a/docs/StatusCallback.md b/docs/StatusCallback.md
index 35de1bfa..226f159d 100644
--- a/docs/StatusCallback.md
+++ b/docs/StatusCallback.md
@@ -23,7 +23,7 @@ instance = Bandwidth::StatusCallback.new(
   event_time: 2024-12-02T20:15:58.278Z,
   type: null,
   to: +15552223333,
-  description: Message delivered to carrier.,
+  description: Message delivered to handset.,
   message: null,
   error_code: 4405,
   carrier_name: AT&amp;T
diff --git a/lib/bandwidth-sdk/models/status_callback_type_enum.rb b/lib/bandwidth-sdk/models/status_callback_type_enum.rb
index 269e5dce..61241dc1 100644
--- a/lib/bandwidth-sdk/models/status_callback_type_enum.rb
+++ b/lib/bandwidth-sdk/models/status_callback_type_enum.rb
@@ -16,12 +16,13 @@
 module Bandwidth
   class StatusCallbackTypeEnum
     MESSAGE_SENDING = 'message-sending'.freeze
+    MESSAGE_SENT = 'message-sent'.freeze
     MESSAGE_DELIVERED = 'message-delivered'.freeze
     MESSAGE_FAILED = 'message-failed'.freeze
     MESSAGE_READ = 'message-read'.freeze
 
     def self.all_vars
-      @all_vars ||= [MESSAGE_SENDING, MESSAGE_DELIVERED, MESSAGE_FAILED, MESSAGE_READ].freeze
+      @all_vars ||= [MESSAGE_SENDING, MESSAGE_SENT, MESSAGE_DELIVERED, MESSAGE_FAILED, MESSAGE_READ].freeze
     end
 
     # Builds the enum from string
diff --git a/spec/unit/models/status_callback_type_enum_spec.rb b/spec/unit/models/status_callback_type_enum_spec.rb
index abcf0398..fb599e39 100644
--- a/spec/unit/models/status_callback_type_enum_spec.rb
+++ b/spec/unit/models/status_callback_type_enum_spec.rb
@@ -5,6 +5,10 @@
       expect(Bandwidth::StatusCallbackTypeEnum::MESSAGE_SENDING).to eq('message-sending')
     end
 
+    it 'defines MESSAGE_SENT' do
+      expect(Bandwidth::StatusCallbackTypeEnum::MESSAGE_SENT).to eq('message-sent')
+    end
+
     it 'defines MESSAGE_DELIVERED' do
       expect(Bandwidth::StatusCallbackTypeEnum::MESSAGE_DELIVERED).to eq('message-delivered')
     end
@@ -22,6 +26,7 @@
     it 'returns every valid enum value' do
       expect(Bandwidth::StatusCallbackTypeEnum.all_vars).to eq([
         'message-sending',
+        'message-sent',
         'message-delivered',
         'message-failed',
         'message-read'
@@ -32,6 +37,7 @@
   describe '.build_from_hash' do
     it 'returns the value when it matches a valid enum value' do
       expect(Bandwidth::StatusCallbackTypeEnum.build_from_hash('message-sending')).to eq('message-sending')
+      expect(Bandwidth::StatusCallbackTypeEnum.build_from_hash('message-sent')).to eq('message-sent')
       expect(Bandwidth::StatusCallbackTypeEnum.build_from_hash('message-delivered')).to eq('message-delivered')
       expect(Bandwidth::StatusCallbackTypeEnum.build_from_hash('message-failed')).to eq('message-failed')
       expect(Bandwidth::StatusCallbackTypeEnum.build_from_hash('message-read')).to eq('message-read')