diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/CallActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/CallActivity.kt
index 8c0a677d..17ed47ba 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/CallActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/CallActivity.kt
@@ -22,6 +22,8 @@ import kotlinx.android.synthetic.main.activity_call.*
 class CallActivity : SimpleActivity() {
     private val CALL_NOTIFICATION_ID = 1
 
+    private var isSpeakerOn = false
+
     override fun onCreate(savedInstanceState: Bundle?) {
         supportActionBar?.hide()
         super.onCreate(savedInstanceState)
@@ -42,10 +44,19 @@ class CallActivity : SimpleActivity() {
         call_accept.setOnClickListener { }
 
         call_toggle_microphone.setOnClickListener { }
-        call_toggle_speaker.setOnClickListener { }
+        call_toggle_speaker.setOnClickListener {
+            toggleSpeaker()
+        }
+
         call_dialpad.setOnClickListener { }
     }
 
+    private fun toggleSpeaker() {
+        isSpeakerOn = !isSpeakerOn
+        val drawable = if (isSpeakerOn) R.drawable.ic_speaker_on_vector else R.drawable.ic_speaker_off_vector
+        call_toggle_speaker.setImageDrawable(getDrawable(drawable))
+    }
+
     @SuppressLint("NewApi")
     private fun showNotification() {
         val channelId = "simple_contacts_call"
diff --git a/app/src/main/res/layout/activity_call.xml b/app/src/main/res/layout/activity_call.xml
index 4da2af3c..458f78b6 100644
--- a/app/src/main/res/layout/activity_call.xml
+++ b/app/src/main/res/layout/activity_call.xml
@@ -66,7 +66,7 @@
             android:layout_height="@dimen/dialpad_button_size"
             android:background="?attr/selectableItemBackgroundBorderless"
             android:padding="@dimen/medium_margin"
-            android:src="@drawable/ic_speaker_on_vector"
+            android:src="@drawable/ic_speaker_off_vector"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"