We've mentioned the issues concerning abnormal amounts of data being used by Windows Phone 7 devices before. Microsoft has investigated the problem and has come to the conclusion that third party solution is the cause.
In a statement to seattlepi.com, a Microsoft spokesperson reported,
No comment as to whom or what the third party solution is. It could be an application or a feature/module of WP7 developed by a third party. Early thoughts pointed to the Feedback feature of Windows Phone 7 and it still could be the likely culprit.
Microsoft did state that they would continue to investigate this issue and will offer any guidance and updates as things become available.
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George is the Reviews Editor at Windows Central, concentrating on Windows 10 PC and Mobile apps. He's been a supporter of the platform since the days of Windows CE and uses his current Windows 10 Mobile phone daily to keep up with life and enjoy a game during down time.