Moscow has an up-to-the-date telecommunications infrastructure. Landline and mobile networks operate almost seamlessly.
For international calls from Russia, dial "+" or “810”, followed by the country code, city code/network code and phone number. To call a number in Russia, dial "+7” first.
Mind that you will need your passport to by a SIM-card. Do not buy cards from street vendors.
Free Wi-Fi is available in public transport (mt_free). Many hotels, restaurants, parks and shopping centres also provide free Wi-Fi.
In some cases, SIM cards bought outside Russia do not allow connection to public Wi-Fi networks or provide only limited access to certain applications.