diff --git a/hal/voice.c b/hal/voice.c
index c455537..0000d72 100644
--- a/hal/voice.c
+++ b/hal/voice.c
@@ -330,7 +330,7 @@
     }
 #endif
 
-    if(adev->mic_break_enabled)
+    if (adev->mic_break_enabled)
         platform_set_mic_break_det(adev->platform, true);
 
     ret = pcm_start(session->pcm_tx);
@@ -786,6 +786,10 @@
 void voice_init(struct audio_device *adev)
 {
     int i = 0;
+    int max_voice_sessions = MAX_VOICE_SESSIONS;
+
+    if (!voice_extn_is_multi_session_supported())
+        max_voice_sessions = 1;
 
     memset(&adev->voice, 0, sizeof(adev->voice));
     adev->voice.tty_mode = TTY_MODE_OFF;
@@ -793,7 +797,7 @@
     adev->voice.volume = 1.0f;
     adev->voice.mic_mute = false;
     adev->voice.in_call = false;
-    for (i = 0; i < MAX_VOICE_SESSIONS; i++) {
+    for (i = 0; i < max_voice_sessions; i++) {
         adev->voice.session[i].pcm_rx = NULL;
         adev->voice.session[i].pcm_tx = NULL;
         adev->voice.session[i].state.current = CALL_INACTIVE;
diff --git a/hal/voice_extn/voice_extn.c b/hal/voice_extn/voice_extn.c
index d278742..e6a4ed6 100644
--- a/hal/voice_extn/voice_extn.c
+++ b/hal/voice_extn/voice_extn.c
@@ -87,6 +87,7 @@
 static bool voice_extn_compress_voip_enabled = false;
 static bool voice_extn_dynamic_ecns_feature_enabled = false;
 static bool voice_extn_incall_music_enabled = false;
+static bool voice_extn_multi_session_enabled = false;
 
 int voice_extn_is_call_state_active(struct audio_device *adev, bool *is_call_active);
 
@@ -184,10 +185,14 @@
     struct voice_session *session = NULL;
     int i = 0;
     uint32_t session_id = 0;
+    int max_voice_sessions = MAX_VOICE_SESSIONS;
 
-    for (i = 0; i < MAX_VOICE_SESSIONS; i++) {
+    if (!voice_extn_is_multi_session_supported())
+        max_voice_sessions = 1;
+
+    for (i = 0; i < max_voice_sessions; i++) {
         session = &adev->voice.session[i];
-        if(session->state.current == call_state){
+        if (session->state.current == call_state){
             session_id = session->vsid;
             break;
         }
@@ -203,10 +208,13 @@
     enum voice_lch_mode lch_mode;
     struct voice_session *session = NULL;
     int ret = 0;
+    int max_voice_sessions = MAX_VOICE_SESSIONS;
 
     ALOGD("%s: enter:", __func__);
+    if (!voice_extn_is_multi_session_supported())
+        max_voice_sessions = 1;
 
-    for (i = 0; i < MAX_VOICE_SESSIONS; i++) {
+    for (i = 0; i < max_voice_sessions; i++) {
         usecase_id = voice_extn_get_usecase_for_session_idx(i);
         session = &adev->voice.session[i];
         ALOGD("%s: cur_state=%d new_state=%d vsid=%x",
@@ -220,7 +228,7 @@
             case CALL_INACTIVE:
                 ALOGD("%s: INACTIVE -> ACTIVE vsid:%x", __func__, session->vsid);
                 ret = voice_start_usecase(adev, usecase_id);
-                if(ret < 0) {
+                if (ret < 0) {
                     ALOGE("%s: voice_start_usecase() failed for usecase: %d\n",
                           __func__, usecase_id);
                 } else {
@@ -258,7 +266,7 @@
             case CALL_LOCAL_HOLD:
                 ALOGD("%s: ACTIVE/HOLD/LOCAL_HOLD -> INACTIVE vsid:%x", __func__, session->vsid);
                 ret = voice_stop_usecase(adev, usecase_id);
-                if(ret < 0) {
+                if (ret < 0) {
                     ALOGE("%s: voice_stop_usecase() failed for usecase: %d\n",
                           __func__, usecase_id);
                 } else {
@@ -334,8 +342,12 @@
     struct voice_session *session = NULL;
     int i = 0;
     bool is_call_active;
+    int max_voice_sessions = MAX_VOICE_SESSIONS;
 
-    for (i = 0; i < MAX_VOICE_SESSIONS; i++) {
+    if (!voice_extn_is_multi_session_supported())
+        max_voice_sessions = 1;
+
+    for (i = 0; i < max_voice_sessions; i++) {
         if (vsid == adev->voice.session[i].vsid) {
             session = &adev->voice.session[i];
             break;
@@ -370,6 +382,9 @@
 int voice_extn_get_active_session_id(struct audio_device *adev,
                                      uint32_t *session_id)
 {
+    if (!voice_extn_is_multi_session_supported())
+        return -ENOSYS;
+
     *session_id = get_session_id_with_state(adev, CALL_ACTIVE);
     return 0;
 }
@@ -378,11 +393,14 @@
 {
     struct voice_session *session = NULL;
     int i = 0;
-    *is_call_active = false;
 
+    if (!voice_extn_is_multi_session_supported())
+        return -ENOSYS;
+
+    *is_call_active = false;
     for (i = 0; i < MAX_VOICE_SESSIONS; i++) {
         session = &adev->voice.session[i];
-        if(session->state.current != CALL_INACTIVE){
+        if (session->state.current != CALL_INACTIVE){
             *is_call_active = true;
             break;
         }
@@ -403,14 +421,17 @@
     return voice_extn_dynamic_ecns_feature_enabled;
 }
 
-// START: INCALL_MUSIC ===================================================================
 void incall_music_feature_init(bool is_feature_enabled)
 {
     voice_extn_incall_music_enabled = is_feature_enabled;
     ALOGV("%s: ---- Feature INCALL_MUSIC is %s----", __func__,
                                 is_feature_enabled ? "ENABLED" : "NOT ENABLED");
 }
-// END: INCALL_MUSIC ===================================================================
+
+bool voice_extn_is_incall_music_enabled()
+{
+    return voice_extn_incall_music_enabled;
+}
 
 void compr_voip_feature_init(bool is_feature_enabled)
 {
@@ -424,6 +445,18 @@
     return voice_extn_compress_voip_enabled;
 }
 
+void multi_voice_session_feature_init(bool is_feature_enabled)
+{
+    voice_extn_multi_session_enabled = is_feature_enabled;
+    ALOGV("%s:: ---- Feature MULTI VOICE SESSION is %s ----", __func__,
+                                is_feature_enabled ? "ENABLED" : "NOT ENABLED");
+}
+
+bool voice_extn_is_multi_session_supported()
+{
+    return voice_extn_multi_session_enabled;
+}
+
 void voice_extn_feature_init()
 {
     // Register feature function here
@@ -437,10 +470,17 @@
     incall_music_feature_init(
        property_get_bool("vendor.audio.feature.incall_music.enable",
                           true));
+    multi_voice_session_feature_init(
+       property_get_bool("vendor.audio.feature.multi_voice_session.enable",
+                          true));
+
 }
 
 void voice_extn_init(struct audio_device *adev)
 {
+    if (!voice_extn_is_multi_session_supported())
+        return;
+
     adev->voice.session[VOICE_SESS_IDX].vsid =  VOICE_VSID;
     adev->voice.session[VOICE2_SESS_IDX].vsid = VOICE2_VSID;
     adev->voice.session[VOLTE_SESS_IDX].vsid =  VOLTE_VSID;
@@ -454,6 +494,8 @@
                                          const audio_usecase_t usecase_id,
                                          struct voice_session **session)
 {
+    if (!voice_extn_is_multi_session_supported())
+        return -ENOSYS;
 
     switch(usecase_id)
     {
@@ -500,6 +542,9 @@
      * udpated.
      */
     ALOGV("%s: enter:", __func__);
+    if (!voice_extn_is_multi_session_supported())
+        return -ENOSYS;
+
     return update_calls(adev);
 }
 
@@ -510,6 +555,9 @@
 
     ALOGV("%s: enter:", __func__);
 
+    if (!voice_extn_is_multi_session_supported())
+        return -ENOSYS;
+
     /* If BT device is enabled and voice calls are ended, telephony will call
      * set_mode(AUDIO_MODE_NORMAL) which will trigger audio policy manager to
      * set routing with device BT A2DP profile. Hence end all voice calls when
@@ -616,8 +664,12 @@
     int ret = 0;
     char *cur_ptr = value;
     int i, len=0;
+    int max_voice_sessions = MAX_VOICE_SESSIONS;
 
-    for (i = 0; i < MAX_VOICE_SESSIONS; i++) {
+    if (!voice_extn_is_multi_session_supported())
+        max_voice_sessions = 1;
+
+    for (i = 0; i < max_voice_sessions; i++) {
         snprintf(cur_ptr, VOICE_EXTN_PARAMETER_VALUE_MAX_LEN - len,
                  "%d:%d,",adev->voice.session[i].vsid,
                  adev->voice.session[i].state.current);
@@ -655,7 +707,7 @@
         }
         str_parms_add_str(reply, AUDIO_PARAMETER_KEY_ALL_CALL_STATES, value);
     }
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         voice_extn_compress_voip_get_parameters(query, reply);
 
     str = str_parms_to_str(reply);
@@ -667,7 +719,7 @@
                                    struct str_parms *query,
                                    struct str_parms *reply)
 {
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         voice_extn_compress_voip_out_get_parameters(out, query, reply);
 }
 
@@ -675,7 +727,7 @@
                                   struct str_parms *query,
                                   struct str_parms *reply)
 {
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         voice_extn_compress_voip_in_get_parameters(in, query, reply);
 }
 
@@ -683,7 +735,7 @@
 int voice_extn_check_and_set_incall_music_usecase(struct audio_device *adev,
                                                   struct stream_out *out)
 {
-    if(voice_extn_incall_music_enabled) {
+    if (voice_extn_incall_music_enabled) {
         uint32_t session_id = get_session_id_with_state(adev, CALL_ACTIVE);
         if (session_id == VOICEMMODE1_VSID) {
             out->usecase = USECASE_INCALL_MUSIC_UPLINK;
@@ -707,10 +759,10 @@
 
 
 int voice_extn_compress_voip_set_parameters(struct audio_device *adev,
-                                             struct str_parms *parms) 
+                                            struct str_parms *parms)
 {
     int ret = -ENOSYS;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_set_parameters(adev, parms);
     return ret;
 }
@@ -718,7 +770,7 @@
 void voice_extn_compress_voip_get_parameters(struct str_parms *query,
                                              struct str_parms *reply)
 {
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         compress_voip_get_parameters(query, reply);
 }
 
@@ -727,7 +779,7 @@
                                                  struct str_parms *query,
                                                  struct str_parms *reply)
 {
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         compress_voip_out_get_parameters(out, query, reply);
 }
 
@@ -735,14 +787,14 @@
                                                 struct str_parms *query,
                                                 struct str_parms *reply)
 {
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         compress_voip_in_get_parameters(in, query, reply);
 }
 
 int voice_extn_compress_voip_out_get_buffer_size(struct stream_out *out)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_out_get_buffer_size(out);
     return ret;
 }
@@ -750,7 +802,7 @@
 int voice_extn_compress_voip_in_get_buffer_size(struct stream_in *in)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_in_get_buffer_size(in);
     return ret;
 }
@@ -759,7 +811,7 @@
 int voice_extn_compress_voip_start_output_stream(struct stream_out *out)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_start_output_stream(out);
     return ret;
 }
@@ -768,7 +820,7 @@
 int voice_extn_compress_voip_start_input_stream(struct stream_in *in)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_start_input_stream(in);
     return ret;
 }
@@ -776,7 +828,7 @@
 int voice_extn_compress_voip_close_output_stream(struct audio_stream *stream)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_close_output_stream(stream);
     return ret;
 }
@@ -785,7 +837,7 @@
 int voice_extn_compress_voip_close_input_stream(struct audio_stream *stream)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_close_input_stream(stream);
     return ret;
 }
@@ -793,7 +845,7 @@
 int voice_extn_compress_voip_open_output_stream(struct stream_out *out)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_open_output_stream(out);
     return ret;
 }
@@ -802,7 +854,7 @@
 int voice_extn_compress_voip_open_input_stream(struct stream_in *in)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_open_input_stream(in);
     return ret;
 }
@@ -810,7 +862,7 @@
 int voice_extn_compress_voip_set_volume(struct audio_device *adev, float volume)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_set_volume(adev, volume);
     return ret;
 }
@@ -818,7 +870,7 @@
 int voice_extn_compress_voip_set_mic_mute(struct audio_device *adev, bool state)
 {
     int ret = -1;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_set_mic_mute(adev, state);
     return ret;
 }
@@ -826,7 +878,7 @@
 bool voice_extn_compress_voip_pcm_prop_check()
 {
     bool ret = false;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_pcm_prop_check();
     return ret;
 }
@@ -834,7 +886,7 @@
 bool voice_extn_compress_voip_is_active(const struct audio_device *adev)
 {
     bool ret = false;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_is_active(adev);
     return ret;
 }
@@ -842,7 +894,7 @@
 bool voice_extn_compress_voip_is_format_supported(audio_format_t format)
 {
     bool ret = false;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_is_format_supported(format);
     return ret;
 }
@@ -850,7 +902,7 @@
 bool voice_extn_compress_voip_is_config_supported(struct audio_config *config)
 {
     bool ret = false;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_is_config_supported(config);
     return ret;
 }
@@ -858,7 +910,7 @@
 bool voice_extn_compress_voip_is_started(struct audio_device *adev)
 {
     bool ret = false;
-    if(voice_extn_compress_voip_enabled)
+    if (voice_extn_compress_voip_enabled)
         ret = compress_voip_is_started(adev);
     return ret;
 }
diff --git a/hal/voice_extn/voice_extn.h b/hal/voice_extn/voice_extn.h
index c4f0d49..b2aab7e 100644
--- a/hal/voice_extn/voice_extn.h
+++ b/hal/voice_extn/voice_extn.h
@@ -78,10 +78,14 @@
 bool voice_extn_compress_voip_is_config_supported(struct audio_config *config);
 bool voice_extn_compress_voip_is_started(struct audio_device *adev);
 void voice_extn_feature_init();
-void compr_voip_feature_init(bool is_feature_enabled);
-bool voice_extn_is_compress_voip_supported();
 void dynamic_ecns_feature_init(bool is_feature_enabled);
 bool voice_extn_is_dynamic_ecns_enabled();
+void incall_music_feature_init(bool is_feature_enabled);
+bool voice_extn_is_incall_music_enabled();
+void compr_voip_feature_init(bool is_feature_enabled);
+bool voice_extn_is_compress_voip_supported();
+void multi_voice_session_feature_init(bool is_feature_enabled);
+bool voice_extn_is_multi_session_supported();
 
 
 #endif //VOICE_EXTN_H