diff --git a/src/hfp_hf.c b/src/hfp_hf.c
index e1d1a55bb..52a09ffb3 100644
--- a/src/hfp_hf.c
+++ b/src/hfp_hf.c
@@ -1214,7 +1214,7 @@ void hfp_hf_terminate_call(bd_addr_t bd_addr){
     // }
 }
 
-void hfp_hf_reject_call(bd_addr_t bd_addr){
+void hfp_hf_reject_incoming_call(bd_addr_t bd_addr){
     hfp_hf_establish_service_level_connection(bd_addr);
     hfp_connection_t * connection = get_hfp_connection_context_for_bd_addr(bd_addr);
     
diff --git a/src/hfp_hf.h b/src/hfp_hf.h
index a709f0317..a7fefdcff 100644
--- a/src/hfp_hf.h
+++ b/src/hfp_hf.h
@@ -203,49 +203,50 @@ void hfp_hf_establish_audio_connection(bd_addr_t bd_addr);
 void hfp_hf_release_audio_connection(bd_addr_t bd_addr);
 
 /**
- * @brief 
+ * @brief Answer incoming call.
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_answer_incoming_call(bd_addr_t bd_addr);
 
 /**
- * @brief 
+ * @brief Reject incoming call.
  * @param bd_addr Bluetooth address of the AG
  */
-void hfp_hf_reject_call(bd_addr_t bd_addr);
+void hfp_hf_reject_incoming_call(bd_addr_t bd_addr);
 
 /**
- * @brief
+ * @brief Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call.
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_user_busy(bd_addr_t addr);
 
 /**
- * @brief
+ * @brief Releases all active calls (if any exist) and accepts the other (held or waiting) call.
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_end_active_and_accept_other(bd_addr_t addr);
 
 /**
- * @brief
+ * @brief Places all active calls (if any exist) on hold and accepts the other (held or waiting) call.
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_swap_calls(bd_addr_t addr);
 
 /**
- * @brief
+ * @brief Adds a held call to the conversation.
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_join_held_call(bd_addr_t addr);
 
 /**
- * @brief
+ * @brief Connects the two calls and disconnects the subscriber from both calls (Explicit Call
+Transfer).
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_connect_calls(bd_addr_t addr);
 
 /**
- * @brief 
+ * @brief Terminates an incoming or an outgoing call.
  * @param bd_addr Bluetooth address of the AG
  */
 void hfp_hf_terminate_call(bd_addr_t bd_addr);
diff --git a/test/hfp/hfp_hf_client_test.c b/test/hfp/hfp_hf_client_test.c
index 56557f2b9..deb06f0ca 100644
--- a/test/hfp/hfp_hf_client_test.c
+++ b/test/hfp/hfp_hf_client_test.c
@@ -149,8 +149,8 @@ static void user_command(char cmd){
             hfp_hf_terminate_call(device_addr);
             break;
         case 'G':
-            printf("Reject call.\n");
-            hfp_hf_reject_call(device_addr);
+            printf("Reject incoming call.\n");
+            hfp_hf_reject_incoming_call(device_addr);
             break;
         case 'g':
             printf("Query operator.\n");
diff --git a/test/pts/hfp_hf_test.c b/test/pts/hfp_hf_test.c
index 9d4e7b9b6..03f3347d7 100644
--- a/test/pts/hfp_hf_test.c
+++ b/test/pts/hfp_hf_test.c
@@ -113,7 +113,7 @@ static void show_usage(void){
     printf("F - Hangup call\n");
 
     printf("g - query network operator name\n");
-    printf("G - reject call\n");
+    printf("G - reject incoming call\n");
 
     printf("i - dial 1234567\n");
     printf("I - dial 7654321\n");
@@ -252,8 +252,8 @@ static int stdin_process(struct data_source *ds){
             break;
         case 'G':
             log_info("USER:\'%c\'", cmd);
-            printf("Reject call.\n");
-            hfp_hf_reject_call(device_addr);
+            printf("Reject incoming call.\n");
+            hfp_hf_reject_incoming_call(device_addr);
             break;
         case 'g':
             log_info("USER:\'%c\'", cmd);
@@ -537,7 +537,7 @@ int btstack_main(int argc, const char * argv[]){
     hfp_hf_init(rfcomm_channel_nr);
     hfp_hf_set_supported_features(438 | (1<<HFP_HFSF_ESCO_S4) | (1<<HFP_HFSF_EC_NR_FUNCTION)); 
     hfp_hf_set_indicators(sizeof(indicators)/sizeof(uint16_t), indicators);
-    hfp_hf_set_codecs(sizeof(codecs), );
+    hfp_hf_set_codecs(sizeof(codecs), codecs);
     hfp_hf_set_indicators_status(1);
     
     hfp_hf_register_packet_handler(packet_handler);