assets/carrier_config_311390.xml

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<carrier_config_list>
    <carrier_config>
        <boolean name="dtmf_type_enabled_bool" value="true"/>
        <boolean name="show_apn_setting_cdma_bool" value="true"/>
        <boolean name="carrier_volte_available_bool" value="true"/>
        <int name="volte_replacement_rat_int" value="6"/>
        <boolean name="mmsCloseConnection" value="true"/>
    </carrier_config>
</carrier_config_list>