We arrived at SVO airport and on our way out approached a Megafon stand to buy a SIM card for our U2 device.
You have to be careful to specify that the SIM card is for a router other wise it might not work properly ( it happened to a friend)
The plan I bought ( at least I think so) is internet L which gives me 20 GB of data for 900 rubles which is about 14 USD. I think this amount should be more than enough.
After three minutes, the U2 device recognized the Sim and started to work of it.
How fast is it?
Here is a screenshot of Speedtest ( indoors)