Anyone who uses PDAnet Wi-Fi tethering?

So I'm using it right now, but I'm very concerned as to if PDAnet can actually "hide" my usage of PDAnet. My concern is that I don't want to rack up a 400 dollar bill from using PDAnet. However I read that they actually can see your data usage, but can't do anything about unofficial tethering because they'd basically have to admit they're spying on people which is illegal. I don't think I'll have to worry either way though because I already have the fully unlimited plan so the worst they could do is charge an extra $30 for using PDAnet. What's funny though is my iphone didn't come with a hotspot option in the first place O. O… Anyway is PDAnet legit? I just don't wanna get into trouble for using it.

Added (1). **forgot to add my carrier is Sprint… I know they're actually really lean about free apps so i don't know it may all be good with them. I'm using PDAnet to just play WoW ;_; I'm not downloading any massive files or anything… Well except right now because I haven't updated WoW on this computer in forever.

Yes, iim using.

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