overlay/frameworks/base/core/res/res/values-mcc310-mnc410/config.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2015, 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.
*/
-->

<!-- These resources are around just to allow their values to be customized
     for different hardware and product builds. -->
<resources>

    <!-- If Voice Radio Technology is RIL_RADIO_TECHNOLOGY_LTE:14 this is the Values
         that should be used instead. A value of RIL_RADIO_TECHNOLOGY_UNKNOWN:0 means
         there is no replacement value and VoLTE is assumed to be supported

         For AT&T we will use RIL_RADIO_TECHNOLOGY_UMTS:3 -->
    <integer name="config_volte_replacement_rat">3</integer>

    <!-- Configure mobile tcp buffer sizes in the form:
         rat-name:rmem_min,rmem_def,rmem_max,wmem_min,wmem_def,wmem_max
         If no value is found for the rat-name in use, the system default will be applied.
    -->
    <string-array name="config_mobile_tcp_buffers">
        <item>umts:131072,262144,1452032,4096,16384,399360</item>
        <item>hspa:131072,262144,1452032,4096,16384,399360</item>
        <item>hsdpa:131072,262144,1452032,4096,16384,399360</item>
        <item>hsupa:131072,262144,1452032,4096,16384,399360</item>
        <item>hspap:131072,262144,1452032,4096,16384,399360</item>
        <item>edge:4093,26280,35040,4096,16384,35040</item>
        <item>gprs:4092,8760,11680,4096,8760,11680</item>
        <item>evdo:4094,87380,262144,4096,16384,262144</item>
        <item>lte:524288,1048576,8388608,262144,524288,4194304</item>
    </string-array>

</resources>