diff --git a/app/src/main/cpp/baresip.c b/app/src/main/cpp/baresip.c
index 115c040e..26bd6586 100644
--- a/app/src/main/cpp/baresip.c
+++ b/app/src/main/cpp/baresip.c
@@ -200,6 +200,12 @@ static void ua_event_handler(struct ua *ua, enum ua_event ev,
         case UA_EVENT_CALL_ESTABLISHED:
             len = re_snprintf(event_buf, sizeof event_buf, "call established");
             break;
+        case UA_EVENT_CALL_REMOTE_SDP:
+            if (strcmp(prm, "offer") != 0)
+                return;
+            ardir = sdp_media_rdir(stream_sdpmedia(audio_strm(call_audio(call))));
+            len = re_snprintf(event_buf, sizeof event_buf, "call update,%d", ardir);
+            break;
         case UA_EVENT_CALL_MENC:
             if (prm[0] == '0')
                 len = re_snprintf(event_buf, sizeof event_buf, "call secure");
diff --git a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
index 41320650..cb7338ac 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
@@ -691,6 +691,17 @@ class BaresipService: Service() {
                         if (!Utils.isVisible())
                             return
                     }
+                    "call update" -> {
+                        val call = Call.ofCallp(callp)
+                        if (call == null) {
+                            Log.w("Baresip", "Call $callp that is updated is not found")
+                            return
+                        }
+                        when (ev[1]) {
+                            "0", "1" -> call.held = true
+                            "2", "3" -> call.held = false
+                        }
+                    }
                     "call verified", "call secure" -> {
                         val call = Call.ofCallp(callp)
                         if (call == null) {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Call.kt b/app/src/main/kotlin/com/tutpro/baresip/Call.kt
index 7276888d..6703b3a1 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Call.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Call.kt
@@ -7,6 +7,7 @@ class Call(val callp: String, val ua: UserAgent, val peerUri: String, val dir: S
            var status: String, val dtmfWatcher: TextWatcher?) {
 
     var onhold = false
+    var held = false
     var security = 0
     var zid = ""
     var hasHistory = false
@@ -24,11 +25,11 @@ class Call(val callp: String, val ua: UserAgent, val peerUri: String, val dir: S
         return call_connect(callp, uri)
     }
 
-    fun startAudio() {
-        call_start_audio(callp)
+    fun hold(): Int {
+        return call_hold(callp, true)
     }
 
-    fun hold(): Int {
+    fun isOnHold(): Int {
         return call_hold(callp, true)
     }
 
diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
index a36baa6c..8c181673 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
@@ -64,6 +64,7 @@ class MainActivity : AppCompatActivity() {
     private lateinit var dtmf: EditText
     private var dtmfWatcher: TextWatcher? = null
     private lateinit var infoButton: ImageButton
+    private lateinit var onHoldNotice: TextView
     private lateinit var uaAdapter: UaSpinnerAdapter
     private lateinit var aorSpinner: Spinner
     private lateinit var imm: InputMethodManager
@@ -140,6 +141,7 @@ class MainActivity : AppCompatActivity() {
         transferButton = binding.transferButton
         dtmf = binding.dtmf
         infoButton = binding.info
+        onHoldNotice = binding.onHoldNotice
         voicemailButton = binding.voicemailButton
         contactsButton = binding.contactsButton
         messagesButton = binding.messagesButton
@@ -943,6 +945,9 @@ class MainActivity : AppCompatActivity() {
                             showCall(ua)
                         }
                     }
+                    "call update" -> {
+                        showCall(ua)
+                    }
                     "call verify" -> {
                         val callp = params[1]
                         val call = Call.ofCallp(callp)
@@ -1674,6 +1679,7 @@ class MainActivity : AppCompatActivity() {
                 BaresipService.isMicMuted = false
                 micIcon!!.setIcon(R.drawable.mic_on)
             }
+            onHoldNotice.visibility = View.GONE
         } else {
             swipeRefresh.isEnabled = false
             val call = showCall ?: Call.uaCalls(ua, "")[0]
@@ -1691,6 +1697,7 @@ class MainActivity : AppCompatActivity() {
                     answerButton.visibility = View.INVISIBLE
                     rejectButton.visibility = View.INVISIBLE
                     callControl.visibility = View.INVISIBLE
+                    onHoldNotice.visibility = View.GONE
                     dialpadButton.isEnabled = false
                 }
                 "incoming" -> {
@@ -1706,6 +1713,7 @@ class MainActivity : AppCompatActivity() {
                     rejectButton.visibility = View.VISIBLE
                     rejectButton.isEnabled = true
                     callControl.visibility = View.INVISIBLE
+                    onHoldNotice.visibility = View.GONE
                     dialpadButton.isEnabled = false
                 }
                 "connected" -> {
@@ -1756,6 +1764,13 @@ class MainActivity : AppCompatActivity() {
                     dialpadButton.isEnabled = false
                     infoButton.isEnabled = true
                     callControl.visibility = View.VISIBLE
+                    if (call.held) {
+                        imm.hideSoftInputFromWindow(dtmf.windowToken, 0)
+                        onHoldNotice.text = getString(R.string.call_on_hold_by_peer)
+                        onHoldNotice.visibility = View.VISIBLE
+                    } else {
+                        onHoldNotice.visibility = View.GONE
+                    }
                 }
             }
         }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 5b79ec14..d28112c6 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -214,17 +214,34 @@
 
     </ScrollView>
 
+    <TextView
+        android:id="@+id/onHoldNotice"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_above="@id/buttons"
+        android:gravity="center"
+        android:visibility="gone"
+        android:textSize="18sp"
+        android:textColor="@color/colorAccent"
+        android:text="@string/call_on_hold_by_peer" >
+    </TextView>
+
+    <LinearLayout
+        android:id="@+id/buttons"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="end"
+        android:layout_alignParentBottom="true" >
+
     <ImageButton
         android:id="@+id/voicemailButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="@null"
         android:src="@drawable/voicemail"
-        android:layout_toStartOf="@id/contactsButton"
         android:layout_marginEnd="10dp"
-        android:layout_alignParentBottom="true"
         android:layout_marginBottom="5dp"
-        android:visibility="invisible"
         android:contentDescription="@string/voicemail" >
     </ImageButton>
 
@@ -234,9 +251,7 @@
         android:layout_height="wrap_content"
         android:background="@null"
         android:src="@drawable/contacts"
-        android:layout_toStartOf="@id/messagesButton"
         android:layout_marginEnd="10dp"
-        android:layout_alignParentBottom="true"
         android:layout_marginBottom="5dp"
         android:contentDescription="@string/contacts" >
     </ImageButton>
@@ -247,9 +262,7 @@
         android:layout_height="wrap_content"
         android:background="@null"
         android:src="@drawable/messages"
-        android:layout_toStartOf="@id/callsButton"
         android:layout_marginEnd="10dp"
-        android:layout_alignParentBottom="true"
         android:layout_marginBottom="5dp"
         android:contentDescription="@string/messages" >
     </ImageButton>
@@ -258,9 +271,7 @@
         android:id="@+id/callsButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_toStartOf="@id/dialpadButton"
         android:layout_marginEnd="10dp"
-        android:layout_alignParentBottom="true"
         android:layout_marginBottom="5dp"
         android:padding="0dp"
         android:background="@null"
@@ -273,12 +284,12 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginEnd="15dp"
-        android:layout_alignParentBottom="true"
         android:layout_marginBottom="8dp"
-        android:layout_alignParentEnd="true"
         android:background="@null"
         android:src="@drawable/dialpad_off"
         android:contentDescription="@string/dialpad" >
     </ImageButton>
 
+    </LinearLayout>
+
 </RelativeLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ac80e60d..d66dec52 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -426,6 +426,7 @@
     <string name="call_is_secure">This call is SECURE and peer is VERIFIED!
         Do you want to unverify the peer?
     </string>
+    <string name="call_on_hold_by_peer">Call is on hold by peer</string>
     <string name="unverify">Unverify</string>
     <string name="backed_up">Application data has been backed up to file \'%1$s\'. In Android
         versions 9 and below, the file is in Download folder.</string>
diff --git a/build.gradle b/build.gradle
index 0303ba59..14b3bbf7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.6.0'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
         mavenCentral()