session-android/res/xml-mcc260-mnc3/mms_config.xml

<?xml version="1.0" encoding="utf-8"?>
<mms_config version="6">
    <bool name="smsUsesSimpleCharactersOnly">false</bool>
    <bool name="allowEnablingWapPushSI">false</bool>
    <bool name="enableWapPushSI">false</bool>
    <int name="httpSocketTimeout">120000</int>
    <int name="maxMessageSize">600000</int>
    <int name="maxImageHeight">768</int>
    <int name="maxImageWidth">1024</int>
    <bool name="mmsRoamingAutoRetrieveByDefault">true</bool>
    <bool name="allowEditingSmscAddress">true</bool>
</mms_config>