diff --git a/wai-server/core/baileys/index.js b/wai-server/core/baileys/index.js
index 4fc46e9..96caaf0 100644
--- a/wai-server/core/baileys/index.js
+++ b/wai-server/core/baileys/index.js
@@ -3,6 +3,7 @@ const {
   Browsers,
   DisconnectReason,
   fetchLatestBaileysVersion,
+  getContentType,
   makeCacheableSignalKeyStore,
   makeInMemoryStore,
   useMultiFileAuthState,
@@ -20,7 +21,7 @@ const generateId = require('../../utils/generateId.util');
 const NodeCache = require('node-cache');
 const P = require('pino');
 
-// https://baileys.whiskeysockets.io/
+// Reference: https://github.com/WhiskeySockets/Baileys/blob/master/README.md
 
 const createWhatsApp = async phone => {
   let qrCode = null;
@@ -78,9 +79,10 @@ const createWhatsApp = async phone => {
           creds: state.creds,
           keys: makeCacheableSignalKeyStore(state.keys, logger),
         },
-        // https://github.com/WhiskeySockets/Baileys/blob/31bc8ab/src/Utils/generics.ts#L21
-        // https://github.com/WhiskeySockets/Baileys/blob/31bc8ab4e2c825c0d774875701ed07e20d05bdb6/WAProto/WAProto.proto
-        browser: Browsers.macOS('SAFARI'),//Browsers.macOS('SAFARI'),//Browsers.ubuntu('IOS_PHONE'),//Browsers.baileys('WEAR_OS'),//
+        // https://github.com/WhiskeySockets/Baileys/blob/master/src/Utils/generics.ts
+        // https://github.com/WhiskeySockets/Baileys/blob/master/WAProto/WAProto.proto
+        // Browsers.macOS('SAFARI'), Browsers.ubuntu('IOS_PHONE'), Browsers.baileys('WEAR_OS'),
+        browser: Browsers.ubuntu('Sales'),
         msgRetryCounterCache,
         generateHighQualityLinkPreview: false,
         syncFullHistory: false,
@@ -142,6 +144,9 @@ const createWhatsApp = async phone => {
 
     const getMessageParser = (original) => {
 
+      const contentType = getContentType(original);
+      // ...
+
       if (original.message?.conversation || original.message?.extendedTextMessage?.text) return parseTextMessage;
 
       if (original.message?.imageMessage) return parseImageMessage;
@@ -152,6 +157,10 @@ const createWhatsApp = async phone => {
     };
 
     const getEventSource = (upsert) => {
+      // source = prefix + infix + suffix
+      // prefix: server.name
+      // infix: upsert/update
+      // suffix: notify/append...
       if (upsert.type === 'notify') {
         return serverConfig.name + '.messages.upsert.notify';
       } else if (upsert.type === 'append') {