13 million people live in Moscow, reports CNN.

But since early March the city "has experienced internet and mobile service outages on a level previously unseen." (Though Wi-Fi access to the internet is still available...) Russian social media "is flooded with jokes and memes about sending letters by carrier pigeons or using smartphones as ping-pong paddles..."

[Moscow residents] complain they cannot navigate around the center or use their favorite mobile apps. The interruptions appear to have had a knock-on effect of making it more difficult to make voice calls or send an SMS. Some are panic-buying walkie-talkies, paper maps, and even pagers.

The latest shutdown builds on similar effor...