How is it possible to determine that the traffic is distributed over wi-fi?

Question

Mobile development

The provider offers unlimited internet for the phone, with some reservations:

Unlimited Internet traffic is provided when accessing the Internet from a smartphone. The distribution of traffic via WI-FI, Bluetooth to other devices, the use of a SIM card in a modem, as well as the provision of file-sharing network services (torrents) are completely limited.

Let's say using a SIM card in a modem and traffic from torrents can be tracked. How can I track the distribution of traffic on a wi-fi provider?

Answer 1

TTL - 1 is usually watched.
Those. on your device there will be one less TTL than on the device to which you distributed the Internet.
You can easily check (in the settings of the network card, increase the TTL by 1, in Windows - in the registry) whether the provider looks at this parameter or something else.
In modems, you are absolutely right, they also look at the SIM card, but also get by with a flashing.