diff --git a/src/com/android/dialer/settings/DialerSettingsActivity.java b/src/com/android/dialer/settings/DialerSettingsActivity.java
index abf854c..c459d35 100644
--- a/src/com/android/dialer/settings/DialerSettingsActivity.java
+++ b/src/com/android/dialer/settings/DialerSettingsActivity.java
@@ -91,10 +91,10 @@
     @Override
     public void onHeaderClick(Header header, int position) {
         if (header.id == R.id.settings_header_sounds_and_vibration) {
-            // If we don't have the AppOp to write to system settings, go to system sound settings
-            // instead. Otherwise, perform the super implementation (which launches our own
-            // preference fragment.
-            if (!PermissionsUtil.hasAppOp(this, AppOpsManager.OPSTR_WRITE_SETTINGS)) {
+            // If we don't have the permission to write to system settings, go to system sound
+            // settings instead. Otherwise, perform the super implementation (which launches our
+            // own preference fragment.
+            if (!Settings.System.canWrite(this)) {
                 Toast.makeText(
                         this,
                         getResources().getString(R.string.toast_cannot_write_system_settings),
diff --git a/src/com/android/dialer/settings/SoundSettingsFragment.java b/src/com/android/dialer/settings/SoundSettingsFragment.java
index 1dedcaa..8384700 100644
--- a/src/com/android/dialer/settings/SoundSettingsFragment.java
+++ b/src/com/android/dialer/settings/SoundSettingsFragment.java
@@ -132,7 +132,7 @@
     public void onResume() {
         super.onResume();
 
-        if (!PermissionsUtil.hasAppOp(getContext(), AppOpsManager.OPSTR_WRITE_SETTINGS)) {
+        if (!Settings.System.canWrite(getContext())) {
             // If the user launches this setting fragment, then toggles the WRITE_SYSTEM_SETTINGS
             // AppOp, then close the fragment since there is nothing useful to do.
             getActivity().onBackPressed();
@@ -155,7 +155,7 @@
      */
     @Override
     public boolean onPreferenceChange(Preference preference, Object objValue) {
-        if (!PermissionsUtil.hasAppOp(getContext(), AppOpsManager.OPSTR_WRITE_SETTINGS)) {
+        if (!Settings.System.canWrite(getContext())) {
             // A user shouldn't be able to get here, but this protects against monkey crashes.
             Toast.makeText(
                     getContext(),
@@ -181,7 +181,7 @@
      */
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
-        if (!PermissionsUtil.hasAppOp(getContext(), AppOpsManager.OPSTR_WRITE_SETTINGS)) {
+        if (!Settings.System.canWrite(getContext())) {
             Toast.makeText(
                     getContext(),
                     getResources().getString(R.string.toast_cannot_write_system_settings),