Dial: *111*59#. Some time after making the request, you will receive SMS with information about your subscription plan.
Call customer service for free (for subscribers of MTS): 0890. ATC will give you the information you need.
Activate the service "Internet assistant" on the website of the operator. Log in to the management page of the service. Information about the current account status, tariff and the tariff plan will be indicated in the first lines.