diff --git a/overlay/packages/services/Telecomm/res/values/config.xml b/overlay/packages/services/Telecomm/res/values/config.xml
new file mode 100644
index 00000000..434b2666
--- /dev/null
+++ b/overlay/packages/services/Telecomm/res/values/config.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<resources>
+  <!-- Device does not support legacy TTY -->
+  <bool name="tty_enabled">false</bool>
+</resources>