assets/carrier_config_carrierid_1961_Airtel.xml

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<carrier_config>
    <boolean name="carrier_default_wfc_ims_roaming_enabled_bool" value="true" />
    <boolean name="carrier_name_override_bool" value="true"/>
    <string name="carrier_name_string">airtel</string>
    <string-array name="roaming_operator_string_array" num="2">
        <item value="404"/>
        <item value="405"/>
    </string-array>
</carrier_config>