Russia is the world's largest country, reaching from Eastern Europe to northern Asia and spanning nine timezones.
Covering such a large area, some providers only operate in some parts of Russia and you may be charged additional roaming fees when travelling between cities. If you are travelling to multiple cities, you should ensure your SIM will work, or consider purchasing several SIM cards to get the best rates.
You should check each provider to make an informed decision on mobile coverage.
Buying a SIM card in Russia
There are no restrictions on buying a SIM card in Russia, but you will need to show your passport or some form of identification when you initially purchase one.