2.2 and hot spot

So after I applied the leak 2.2 update I seem to be getting hot spot. My question is, was it always on or did I get it from the update that I did. Also would sprint know if i'm using it?
 

meyerweb

Android Enthusiast
How will Sprint know if you're using it? I don't know, but trust me, they will. If you choose to use it anyway, watch your bill closely.
 
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