diff --git a/src/com/android/services/telephony/GsmConnection.java b/src/com/android/services/telephony/GsmConnection.java
index dd47e8d..eec0951 100644
--- a/src/com/android/services/telephony/GsmConnection.java
+++ b/src/com/android/services/telephony/GsmConnection.java
@@ -60,6 +60,9 @@
     protected int buildConnectionCapabilities() {
         int capabilities = super.buildConnectionCapabilities();
         capabilities |= CAPABILITY_MUTE;
+        // Overwrites TelephonyConnection.buildConnectionCapabilities() and resets the hold options
+        // because all GSM calls should hold, even if the carrier config option is set to not show
+        // hold for IMS calls.
         if (!shouldTreatAsEmergencyCall()) {
             capabilities |= CAPABILITY_SUPPORT_HOLD;
             if (getState() == STATE_ACTIVE || getState() == STATE_HOLDING) {
diff --git a/src/com/android/services/telephony/TelephonyConnection.java b/src/com/android/services/telephony/TelephonyConnection.java
index d2035cc..1e4feca 100644
--- a/src/com/android/services/telephony/TelephonyConnection.java
+++ b/src/com/android/services/telephony/TelephonyConnection.java
@@ -660,12 +660,10 @@
         if (mOriginalConnection != null && mOriginalConnection.isIncoming()) {
             callCapabilities |= CAPABILITY_SPEED_UP_MT_AUDIO;
         }
-        if (isImsConnection()) {
-            if (!shouldTreatAsEmergencyCall()) {
-                callCapabilities |= CAPABILITY_SUPPORT_HOLD;
-                if (getState() == STATE_ACTIVE || getState() == STATE_HOLDING) {
-                    callCapabilities |= CAPABILITY_HOLD;
-                }
+        if (!shouldTreatAsEmergencyCall() && isImsConnection() && canHoldImsCalls()) {
+            callCapabilities |= CAPABILITY_SUPPORT_HOLD;
+            if (getState() == STATE_ACTIVE || getState() == STATE_HOLDING) {
+                callCapabilities |= CAPABILITY_HOLD;
             }
         }
 
@@ -896,6 +894,12 @@
         return true;
     }
 
+    private boolean canHoldImsCalls() {
+        PersistableBundle b = getCarrierConfig();
+        // Return true if the CarrierConfig is unavailable
+        return b == null || b.getBoolean(CarrierConfigManager.KEY_ALLOW_HOLD_IN_IMS_CALL_BOOL);
+    }
+
     private PersistableBundle getCarrierConfig() {
         Phone phone = getPhone();
         if (phone == null) {