They can use these statistics to better understand the behaviors of the subscribers in
terms of their phone models.
They can also determine how the various phones are being used, and whether or not
subscribers are using all capabilities of the device. If a device identified supports video,
the operator can track the actual usage of all video-enabled devices to determine how
many actually use this capability, when they use the capability, and so on.
This data could even be used for promotional campaigns to alert all users of certain
models of devices of new features and applications that are being offered for their devices.
Application servers can also process this information and use it for various applications.
USER-AGENT: Vista Beta1.5
Via The VIA header is a means of recording the path that a request takes to reach its
destination so that all responses follow the same path. When using loose routing, the
VIA header ensures that responses are received by stateful proxies in the call path. In
strict routing, this is used in conjunction with the RECORD-ROUTE header.
The difference is that the VIA header is used by the proxies to determine the next
hop in the network for a response, while RECORD-ROUTE is actually used to create a
route list that will be used for routing all requests and responses to a device throughout
the life of its registration.
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