This a part of a letter from Sprint,
We want to make sure you are familiar with the terms under which we provide data services to you. ...found in our general terms and condition of service provide that you can't use our data services with server devices or host computers applications, or other systems that drives continiuous heavy traffic or data sessions. One of the examples provides that our data services may not be used to generate excessive amount of internet traffic through the continuous, unattended streaming, downloading or uploading of videos or other files or to operate hosting services including, but not limited to, web or gaming hosting...
I had theter my phone via USB with pdanet app, it is something I can do to spring does not monitor the webpages I go.