diff --git a/include/hardware/bt_hf.h b/include/hardware/bt_hf.h
index 7dcb40a..6a86f86 100644
--- a/include/hardware/bt_hf.h
+++ b/include/hardware/bt_hf.h
@@ -65,6 +65,15 @@
    BTHF_WBS_YES
 }bthf_wbs_config_t;
 
+/* BIND type*/
+typedef enum
+{
+   BTHF_BIND_SET,
+   BTHF_BIND_READ,
+   BTHF_BIND_TEST
+}bthf_bind_type_t;
+
+
 /* CHLD - Call held handling */
 typedef enum
 {
@@ -152,6 +161,15 @@
  */
 typedef void (* bthf_key_pressed_cmd_callback)(bt_bdaddr_t *bd_addr);
 
+/** Callback for HF indicators (BIND)
+ */
+typedef void (* bthf_bind_cmd_callback)(char* hf_ind, bthf_bind_type_t type, bt_bdaddr_t *bd_addr);
+
+/** Callback for HF indicator value (BIEV)
+ */
+typedef void (* bthf_biev_cmd_callback)(char* hf_ind_val, bt_bdaddr_t *bd_addr);
+
+
 /** BT-HF callback structure. */
 typedef struct {
     /** set to sizeof(BtHfCallbacks) */
@@ -173,6 +191,8 @@
     bthf_clcc_cmd_callback          clcc_cmd_cb;
     bthf_unknown_at_cmd_callback    unknown_at_cmd_cb;
     bthf_key_pressed_cmd_callback   key_pressed_cmd_cb;
+    bthf_bind_cmd_callback          bind_cmd_cb;
+    bthf_biev_cmd_callback          biev_cmd_cb;
 } bthf_callbacks_t;
 
 /** Network Status */
@@ -216,6 +236,11 @@
 } bthf_call_mpty_type_t;
 
 typedef enum {
+    BTHF_HF_INDICATOR_STATE_DISABLED = 0,
+    BTHF_HF_INDICATOR_STATE_ENABLED
+} bthf_hf_indicator_status_t;
+
+typedef enum {
     BTHF_CALL_ADDRTYPE_UNKNOWN = 0x81,
     BTHF_CALL_ADDRTYPE_INTERNATIONAL = 0x91
 } bthf_call_addrtype_t;
@@ -294,6 +319,13 @@
 
     /** configureation for the SCO codec */
     bt_status_t (*configure_wbs)( bt_bdaddr_t *bd_addr ,bthf_wbs_config_t config );
+
+    /** Response for BIND READ command and activation/deactivation of  HF indicator */
+    bt_status_t (*bind_response) (int anum, bthf_hf_indicator_status_t status,
+                                  bt_bdaddr_t *bd_addr);
+
+    /** Response for BIND TEST command */
+    bt_status_t (*bind_string_response) (const char* result, bt_bdaddr_t *bd_addr);
 } bthf_interface_t;
 
 __END_DECLS