To activate you need to send a photo of the SIM card (or 20 digits of ICC), the main page of the passport and full home address to email: email@example.com.
Without activation it will not be possible for you to receive mobile data, send messages, or make/receive phone calls. You can activate the SIM-card from 9 am to 8 pm. The activation can take up to 1 hour. When sim-card is activated, you will get an email from operator with the instructions on how to use and extend the service during your trip in Russia.