diff --git a/assets/carrier_config_carrierid_1187_AT&T.xml b/assets/carrier_config_carrierid_1187_AT&T.xml
index 5e786ee..1fdf056 100644
--- a/assets/carrier_config_carrierid_1187_AT&T.xml
+++ b/assets/carrier_config_carrierid_1187_AT&T.xml
@@ -13,6 +13,7 @@
     <int name="maxMessageSize" value="1048576"/>
     <int name="recipientLimit" value="10"/>
     <int name="volte_replacement_rat_int" value="3"/>
+    <int name="ims_dtmf_tone_delay_int" value="120"/>
     <string name="carrier_name_string">AT&amp;T</string>
     <string-array name="carrier_data_call_retry_config_strings" num="3">
         <item value="default:default_randomization=2000,10000,18000:5000,720000:5000,2160000:5000"/>