Traffic compression principle traffic statistics software

For example: the rapid flow of compressed instrument, which is based on what traffic statistics for each iphone phone usage? It is the server-side statistics statistics or on the phone? Probably principle is kind of how it? Find great God? Points is not enough, you can add
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Well, many such software on the phone, such as Wali traffic, Internet QuickBird wait. The basic principle is to modify the phone's APN, set a global agency, the phone all communication data compression through their own servers to forward. Install such software has some risk, because all communication data is exposed to the proxy server, they can help you compress when happy, when unhappy, huh ...., read a hell of an idea of ​​heaven
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cited a floor Tannear reply:

Well, many such software on the phone, such as Wali traffic, Internet QuickBird wait. The basic principle is to modify the phone's APN, set a global agency, the phone all communication data compression through their own servers to forward. Install such software has some risk, because all communication data is exposed to the proxy server, they can help you compress when happy, when unhappy, huh ...., a hell of an idea to read Paradise

The key is that these software is how traffic statistics for each phone consumes it? What fields by tracking each phone?
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Do not sink ah, heroes advice. Enough, points plus
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