How would the traffic be different? I would also like to know how they can tell. I figured streaming (or whatever) with the device that has the sim would look the same as if I were streaming it to a laptop tethered to that device.I wonder how telcos are able to tell if you're tethering or not. They could tell by the type of traffic you're requesting, I guess, but only after observing your connection for a little while, whereas if you're not set up for tethering, telcos these days block the connection on the first packet, it seems.
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