diff --git a/overlay/packages/services/Telephony/res/values/config.xml b/overlay/packages/services/Telephony/res/values/config.xml
index d87c086a..e57f7f53 100644
--- a/overlay/packages/services/Telephony/res/values/config.xml
+++ b/overlay/packages/services/Telephony/res/values/config.xml
@@ -22,11 +22,6 @@
 <!-- Phone app resources that may need to be customized
      for different hardware or product builds. -->
 <resources>
-    <!-- Determine whether calls to mute the microphone in PhoneUtils
-         are routed through the android.media.AudioManager class (true) or through
-         the com.android.internal.telephony.Phone interface (false). -->
-    <bool name="send_mic_mute_to_AudioManager">true</bool>
-
     <!-- Flag indicating if hac is enabled -->
     <bool name="hac_enabled">true</bool>