diff --git a/include/hardware/bt_gatt_client.h b/include/hardware/bt_gatt_client.h
index c03e774..d6b0cb4 100644
--- a/include/hardware/bt_gatt_client.h
+++ b/include/hardware/bt_gatt_client.h
@@ -151,6 +151,11 @@
 typedef void (*read_remote_rssi_callback)(int client_if, bt_bdaddr_t* bda,
                                           int rssi, int status);
 
+/**
+ * Callback indicationg the status of a listen() operation
+ */
+typedef void (*listen_callback)(int status, int server_if);
+
 typedef struct {
     register_client_callback            register_client_cb;
     scan_result_callback                scan_result_cb;
@@ -169,6 +174,7 @@
     write_descriptor_callback           write_descriptor_cb;
     execute_write_callback              execute_write_cb;
     read_remote_rssi_callback           read_remote_rssi_cb;
+    listen_callback                     listen_cb;
 } btgatt_client_callbacks_t;
 
 /** Represents the standard BT-GATT client interface. */
@@ -191,6 +197,9 @@
     bt_status_t (*disconnect)( int client_if, const bt_bdaddr_t *bd_addr,
                     int conn_id);
 
+    /** Start or stop advertisements to listen for incoming connections */
+    bt_status_t (*listen)(int client_if, bool start);
+
     /** Clear the attribute cache for a given device */
     bt_status_t (*refresh)( int client_if, const bt_bdaddr_t *bd_addr );
 
@@ -266,6 +275,11 @@
     /** Determine the type of the remote device (LE, BR/EDR, Dual-mode) */
     int (*get_device_type)( const bt_bdaddr_t *bd_addr );
 
+    /** Set the advertising data or scan response data */
+    bt_status_t (*set_adv_data)(int server_if, bool set_scan_rsp, bool include_name,
+                    bool include_txpower, int min_interval, int max_interval, int appearance,
+                    uint16_t manufacturer_len, char* manufacturer_data);
+
     /** Test mode interface */
     bt_status_t (*test_command)( int command, btgatt_test_params_t* params);
 } btgatt_client_interface_t;