diff --git a/src/controllers/clientController.js b/src/controllers/clientController.js
index b0d2c50..c689d10 100644
--- a/src/controllers/clientController.js
+++ b/src/controllers/clientController.js
@@ -1812,6 +1812,49 @@ const setBackgroundSync = async (req, res) => {
   }
 }
 
+/**
+ * Retrieve the contact lid and phone number for a specific chat.
+ *
+ * @async
+ * @function
+ * @param {Object} req - The HTTP request object containing the chatId and sessionId.
+ * @param {string} req.body.chatId - The unique identifier of the chat to unmute.
+ * @param {string} req.params.sessionId - The unique identifier of the session associated with the client to use.
+ * @param {Object} res - The HTTP response object.
+ * @returns {Promise<Object>} - A Promise that resolves with a JSON object containing a success flag and the result of the operation.
+ * @throws {Error} - If an error occurs during the operation, it is thrown and handled by the catch block.
+ */
+const getContactLidAndPhone = async (req, res) => {
+  /*
+    #swagger.summary = 'Get contact lid and phone'
+    #swagger.description = 'Retrieve the contact lid and phone number for a specific chat'
+    #swagger.requestBody = {
+      required: true,
+      schema: {
+        type: 'object',
+        properties: {
+          userIds: {
+            type: 'array',
+            items: {
+              type: 'string',
+              description: 'The unique identifier of the user',
+            },
+            example: ['6281288888888@c.us']
+          },
+        }
+      },
+    }
+  */
+  try {
+    const { userIds = [] } = req.body
+    const client = sessions.get(req.params.sessionId)
+    const result = await client.getContactLidAndPhone(userIds)
+    res.json({ success: true, data: result })
+  } catch (error) {
+    sendErrorResponse(res, 500, error.message)
+  }
+}
+
 module.exports = {
   getClassInfo,
   acceptInvite,
@@ -1860,5 +1903,6 @@ module.exports = {
   openChatWindow,
   openChatWindowAt,
   resetState,
-  setBackgroundSync
+  setBackgroundSync,
+  getContactLidAndPhone
 }
diff --git a/src/routes.js b/src/routes.js
index b1ed00b..d52f869 100644
--- a/src/routes.js
+++ b/src/routes.js
@@ -108,6 +108,7 @@ clientRouter.post('/openChatWindow/:sessionId', [middleware.sessionNameValidatio
 clientRouter.post('/openChatWindowAt/:sessionId', [middleware.sessionNameValidation, middleware.sessionValidation], clientController.openChatWindowAt)
 clientRouter.post('/resetState/:sessionId', [middleware.sessionNameValidation, middleware.sessionValidation], clientController.resetState)
 clientRouter.post('/setBackgroundSync/:sessionId', [middleware.sessionNameValidation, middleware.sessionValidation], clientController.setBackgroundSync)
+clientRouter.post('/getContactLidAndPhone/:sessionId', [middleware.sessionNameValidation, middleware.sessionValidation], clientController.getContactLidAndPhone)
 
 /**
  * ================
diff --git a/swagger.json b/swagger.json
index 8149f76..9c0553e 100644
--- a/swagger.json
+++ b/swagger.json
@@ -3732,10 +3732,15 @@
               "schema": {
                 "type": "object",
                 "properties": {
-                  "flag": {
-                    "type": "boolean",
-                    "description": "flag true/false",
-                    "example": true
+                  "userIds": {
+                    "type": "array",
+                    "items": {
+                      "type": "string",
+                      "description": "The unique identifier of the user"
+                    },
+                    "example": [
+                      "6281288888888@c.us"
+                    ]
                   }
                 }
               }
@@ -3744,10 +3749,15 @@
               "schema": {
                 "type": "object",
                 "properties": {
-                  "flag": {
-                    "type": "boolean",
-                    "description": "flag true/false",
-                    "example": true
+                  "userIds": {
+                    "type": "array",
+                    "items": {
+                      "type": "string",
+                      "description": "The unique identifier of the user"
+                    },
+                    "example": [
+                      "6281288888888@c.us"
+                    ]
                   }
                 }
               }
@@ -5469,6 +5479,116 @@
         }
       }
     },
+    "/client/getContactLidAndPhone/{sessionId}": {
+      "post": {
+        "tags": [
+          "Client"
+        ],
+        "summary": "Get contact lid and phone",
+        "description": "Retrieve the contact lid and phone number for a specific chat",
+        "parameters": [
+          {
+            "name": "sessionId",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            },
+            "description": "Unique identifier for the session (alphanumeric and - allowed)",
+            "example": "f8377d8d-a589-4242-9ba6-9486a04ef80c"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK"
+          },
+          "403": {
+            "description": "Forbidden.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ForbiddenResponse"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Not Found.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/NotFoundResponse"
+                }
+              }
+            }
+          },
+          "422": {
+            "description": "Unprocessable Entity.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Server failure.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "apiKeyAuth": []
+          }
+        ],
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "type": "object",
+                "properties": {
+                  "userIds": {
+                    "type": "array",
+                    "items": {
+                      "type": "string",
+                      "description": "The unique identifier of the user"
+                    },
+                    "example": [
+                      "6281288888888@c.us"
+                    ]
+                  }
+                }
+              }
+            },
+            "application/xml": {
+              "schema": {
+                "type": "object",
+                "properties": {
+                  "userIds": {
+                    "type": "array",
+                    "items": {
+                      "type": "string",
+                      "description": "The unique identifier of the user"
+                    },
+                    "example": [
+                      "6281288888888@c.us"
+                    ]
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/chat/getClassInfo/{sessionId}": {
       "post": {
         "tags": [