Data Usage Docs in Android 4.0 for Systems Integrators.
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+<!--
+ Copyright 2012 The Android Open Source Project
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+ 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
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+ 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.
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+
+# Data Usage Technical Information #
+
+Android 4.0 (Ice Cream Sandwich) introduces new features that help
+users understand and control how their device uses network data. It
+monitors overall data usage, and supports warning or limit thresholds
+which will trigger notifications or disable mobile data when usage
+exceeds a specific quota.
+
+Data usage is also tracked on a per-application basis, enabling users
+to visually explore historical usage in the Settings app. Users can
+also restrict how specific applications are allowed to use data when
+running in the background.
+
+The documentation in this section is intended for systems integrators
+and mobile operators, to help explain technical details they should be
+aware of when porting Android to specific devices. These details are
+summarized below, and the
+[android-porting](mailto:android-porting+subscribe@googlegroups.com)
+mailing list is a good place for further discussion.
+
+