An article in Continuous Computing News (a vendor of DPI enabling technology) mentions a number of carriers deploying DPI - among them, and the biggest one: T-Mobile (I believe it refers to the US network)
" ..Mark Ellis-Jones, head of data network design and planning at T-Mobile [USA], agrees. “[DPI is] almost like UMTS: it has the technical capability, but will anyone leverage it for commercial gain?” he asks. “There is no view in achieving that any time soon ... T-Mobile uses DPI to enhance a customer’s experience by giving priority to what it calls “conversational” real-time traffic. “To give more response to low-latency traffic such as video compared to background tasks such as file downloads,” says Ellis-JonesT-mobile does not disclose its full traffic management policies. They may be only prioritizing traffic that requires real-time performance (as said). However, they don’t say if they are limiting file downloads, regardless whether there real-time traffic is present or not. They don’t say if they are doing this on the subscriber, base-station, backhaul link or total network level.
Nevertheless, it is still not common to get such statements these days, when Net Neutrality is still an outstanding issue in the US.
Other MNOs mentioned - Yoigo (Spain) and BT (DPI in the context of content is targeted advertising).
See full article here.
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