Interesting that it does not show how they can detect that the tethering is being done. Could be usage, or something on the iphone is reporting to apple or At&T directly.
Every device that access the internet has a MAC address. This is part of data packets when accessing the internet.
It's astounding, AT&T seems determined to piss off its customers.
Do they have any right at all to do this?
Do they have any right at all to do this?
Furthermore, plans (unless specifically designated for tethering usage) cannot be used for any applications that tether the device (through use of, including without limitation, connection kits, other phone/smartphone to computer accessories, BLUETOOTH® or any other wireless technology) to Personal Computers (including without limitation, laptops), or other equipment for any purpose.
MAC address is a layer 2 construct, and as such is link local. What this means is a packet from your tethered device has that device's MAC as a source, and the MAC of your iPhone's WiFi or Bluetooth as a destination. When the iPhone sends it along, source MAC is the iPhone's GSM radio, and destination MAC is AT&T's router at the cell tower. The tethered device is no longer visible.
It's astounding, AT&T seems determined to piss off its customers.