Microsoft has included its Data Sense app in the Windows Phone 8.1 Developer Preview regardless of whether carriers include it in their standard updates or if they supported it in Windows Phone 8.
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Microsoft has released details of the next update to Windows Phone 8, which will start rolling out to devices over the next few weeks, bringing FM radio, Data Sense and more to supported devices.
Microsoft has now unveiled Data Sense. This new feature in Windows Phone 8 is designed to help users keep their data usage in check, while simultaneously giving them detailed info on their usage.