diff --git a/coreapi/linphonecall.c b/coreapi/linphonecall.c
index 272b2eb84..9052f71c7 100644
--- a/coreapi/linphonecall.c
+++ b/coreapi/linphonecall.c
@@ -1325,7 +1325,7 @@ void linphone_call_set_state(LinphoneCall *call, LinphoneCallState cstate, const
 			break;
 		case LinphoneCallConnected:
 			call->log->status=LinphoneCallSuccess;
-			call->log->connected_date_time=time(NULL);
+			call->log->connected_date_time = ms_time(NULL);
 			break;
 		case LinphoneCallReleased:
 #ifdef ANDROID
@@ -1726,7 +1726,7 @@ bool_t linphone_call_has_transfer_pending(const LinphoneCall *call){
 **/
 int linphone_call_get_duration(const LinphoneCall *call){
 	if (call->log->connected_date_time==0) return 0;
-	return time(NULL)-call->log->connected_date_time;
+	return ms_time(NULL)-call->log->connected_date_time;
 }
 
 /**
@@ -3638,18 +3638,17 @@ static void report_bandwidth(LinphoneCall *call, MediaStream *as, MediaStream *v
 	call->stats[LINPHONE_CALL_STATS_AUDIO].rtcp_upload_bandwidth=(as_active) ? (media_stream_get_rtcp_up_bw(as)*1e-3) : 0;
 	call->stats[LINPHONE_CALL_STATS_VIDEO].rtcp_download_bandwidth=(vs_active) ? (media_stream_get_rtcp_down_bw(vs)*1e-3) : 0;
 	call->stats[LINPHONE_CALL_STATS_VIDEO].rtcp_upload_bandwidth=(vs_active) ? (media_stream_get_rtcp_up_bw(vs)*1e-3) : 0;
-	if (as_active) {
-		call->stats[LINPHONE_CALL_STATS_AUDIO].updated|=LINPHONE_CALL_STATS_PERIODICAL_UPDATE;
-		linphone_core_notify_call_stats_updated(call->core, call, &call->stats[LINPHONE_CALL_STATS_AUDIO]);
-		call->stats[LINPHONE_CALL_STATS_AUDIO].updated=0;
-		update_local_stats(&call->stats[LINPHONE_CALL_STATS_AUDIO], as);
-	}
-	if (vs_active) {
-		call->stats[LINPHONE_CALL_STATS_VIDEO].updated|=LINPHONE_CALL_STATS_PERIODICAL_UPDATE;
-		linphone_core_notify_call_stats_updated(call->core, call, &call->stats[LINPHONE_CALL_STATS_VIDEO]);
-		call->stats[LINPHONE_CALL_STATS_VIDEO].updated=0;
-		update_local_stats(&call->stats[LINPHONE_CALL_STATS_VIDEO], vs);
-	}
+	
+	call->stats[LINPHONE_CALL_STATS_AUDIO].updated|=LINPHONE_CALL_STATS_PERIODICAL_UPDATE;
+	linphone_core_notify_call_stats_updated(call->core, call, &call->stats[LINPHONE_CALL_STATS_AUDIO]);
+	call->stats[LINPHONE_CALL_STATS_AUDIO].updated=0;
+	update_local_stats(&call->stats[LINPHONE_CALL_STATS_AUDIO], as);
+
+	call->stats[LINPHONE_CALL_STATS_VIDEO].updated|=LINPHONE_CALL_STATS_PERIODICAL_UPDATE;
+	linphone_core_notify_call_stats_updated(call->core, call, &call->stats[LINPHONE_CALL_STATS_VIDEO]);
+	call->stats[LINPHONE_CALL_STATS_VIDEO].updated=0;
+	update_local_stats(&call->stats[LINPHONE_CALL_STATS_VIDEO], vs);
+	
 
 	ms_message(	"Bandwidth usage for call [%p]:\n"
 				"\tRTP  audio=[d=%5.1f,u=%5.1f], video=[d=%5.1f,u=%5.1f] kbits/sec\n"
diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 057e27388..0133d2056 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -2397,10 +2397,12 @@ static void linphone_core_do_plugin_tasks(LinphoneCore *lc){
 void linphone_core_iterate(LinphoneCore *lc){
 	MSList *calls;
 	LinphoneCall *call;
-	time_t curtime=time(NULL);
+	uint64_t curtime_ms = ms_get_cur_time_ms(); /*monotonic time*/
 	int elapsed;
+	time_t current_real_time = ms_time(NULL);
 	bool_t one_second_elapsed=FALSE;
 	const char *remote_provisioning_uri = NULL;
+	
 	if (lc->network_reachable_to_be_notified) {
 		lc->network_reachable_to_be_notified=FALSE;
 		linphone_core_notify_network_reachable(lc,lc->network_reachable);
@@ -2423,9 +2425,11 @@ void linphone_core_iterate(LinphoneCore *lc){
 			}
 		} // else linphone_configuring_terminated has already been called in linphone_core_init
 	}
-
-	if (curtime-lc->prevtime>=1){
-		lc->prevtime=curtime;
+	if (lc->prevtime_ms == 0){
+		lc->prevtime_ms = curtime_ms;
+	}
+	if (curtime_ms-lc->prevtime_ms >= 1000){
+		lc->prevtime_ms += 1000;
 		one_second_elapsed=TRUE;
 	}
 
@@ -2457,7 +2461,7 @@ void linphone_core_iterate(LinphoneCore *lc){
 	}
 
 	if (lc->ringstream && lc->ringstream_autorelease && lc->dmfs_playing_start_time!=0
-		&& (curtime-lc->dmfs_playing_start_time)>5){
+		&& (curtime_ms/1000 - lc->dmfs_playing_start_time)>5){
 		MSPlayerState state;
 		bool_t stop=TRUE;
 		if (lc->ringstream->source && ms_filter_call_method(lc->ringstream->source,MS_PLAYER_GET_STATE,&state)==0){
@@ -2471,15 +2475,15 @@ void linphone_core_iterate(LinphoneCore *lc){
 
 	sal_iterate(lc->sal);
 	if (lc->msevq) ms_event_queue_pump(lc->msevq);
-	if (lc->auto_net_state_mon) monitor_network_state(lc,curtime);
+	if (lc->auto_net_state_mon) monitor_network_state(lc, current_real_time);
 
 	proxy_update(lc);
 
 	//we have to iterate for each call
-	calls= lc->calls;
+	calls = lc->calls;
 	while(calls!= NULL){
 		call = (LinphoneCall *)calls->data;
-		elapsed = curtime-call->log->start_date_time;
+		elapsed = current_real_time - call->log->start_date_time;
 		 /* get immediately a reference to next one in case the one
 		 we are going to examine is destroy and removed during
 		 linphone_core_start_invite() */
@@ -2514,7 +2518,7 @@ void linphone_core_iterate(LinphoneCore *lc){
 		}
 		if ( (lc->sip_conf.in_call_timeout > 0)
 			 && (call->log->connected_date_time != 0)
-			 && ((curtime - call->log->connected_date_time) > lc->sip_conf.in_call_timeout))
+			 && ((current_real_time - call->log->connected_date_time) > lc->sip_conf.in_call_timeout))
 		{
 			ms_message("in call timeout (%i)",lc->sip_conf.in_call_timeout);
 			linphone_core_terminate_call(lc,call);
@@ -2535,7 +2539,7 @@ void linphone_core_iterate(LinphoneCore *lc){
 	linphone_core_run_hooks(lc);
 	linphone_core_do_plugin_tasks(lc);
 
-	if (lc->network_reachable && lc->netup_time!=0 && (curtime-lc->netup_time)>3){
+	if (lc->network_reachable && lc->netup_time!=0 && (current_real_time-lc->netup_time)>3){
 		/*not do that immediately, take your time.*/
 		linphone_core_send_initial_subscribes(lc);
 	}
@@ -5760,11 +5764,11 @@ static MSFilter *get_audio_resource(LinphoneCore *lc, LinphoneAudioResourceType
 
 		ringstream=lc->ringstream=ring_start(NULL,0,ringcard);
 		ms_filter_call_method(lc->ringstream->gendtmf,MS_DTMF_GEN_SET_DEFAULT_AMPLITUDE,&amp);
-		lc->dmfs_playing_start_time=time(NULL);
+		lc->dmfs_playing_start_time = ms_get_cur_time_ms()/1000;
 	}else{
 		ringstream=lc->ringstream;
 		if (lc->dmfs_playing_start_time!=0)
-			lc->dmfs_playing_start_time=time(NULL);
+			lc->dmfs_playing_start_time = ms_get_cur_time_ms()/1000;
 	}
 	if (rtype==LinphoneToneGenerator) return ringstream->gendtmf;
 	if (rtype==LinphoneLocalPlayer) return ringstream->source;
diff --git a/coreapi/private.h b/coreapi/private.h
index 3766edb4d..142e2c3cc 100644
--- a/coreapi/private.h
+++ b/coreapi/private.h
@@ -811,7 +811,7 @@ struct _LinphoneCore
 	void *data;
 	char *play_file;
 	char *rec_file;
-	time_t prevtime;
+	uint64_t prevtime_ms;
 	int audio_bw; /*IP bw consumed by audio codec, set as soon as used codec is known, its purpose is to know the remaining bw for video*/
 	LinphoneCoreWaitingCallback wait_cb;
 	void *wait_ctx;
diff --git a/tester/call_tester.c b/tester/call_tester.c
index 8bb779436..229aa14fc 100644
--- a/tester/call_tester.c
+++ b/tester/call_tester.c
@@ -3332,9 +3332,10 @@ void check_media_direction(LinphoneCoreManager* mgr, LinphoneCall *call, MSList*
 			switch (audio_dir) {
 				case LinphoneMediaDirectionInactive:
 					BC_ASSERT_LOWER(linphone_core_manager_get_mean_audio_up_bw(mgr), 5, int, "%i");
+					BC_ASSERT_LOWER(linphone_core_manager_get_mean_audio_down_bw(mgr), 5, int, "%i");
+					break;
 				case LinphoneMediaDirectionSendOnly:
-					BC_ASSERT_LOWER(linphone_call_get_video_stats(call)->download_bandwidth, 5, int, "%i");
-					BC_ASSERT_TRUE(wait_for_list(lcs,mgr->stat.current_audio_upload_bandwidth,70,4000));
+					BC_ASSERT_GREATER(linphone_core_manager_get_mean_audio_up_bw(mgr), 70, int, "%i");
 					break;
 				case LinphoneMediaDirectionRecvOnly:
 					BC_ASSERT_LOWER(linphone_core_manager_get_mean_audio_up_bw(mgr), 5, int, "%i");