I live in Petersburg. I have been using this router for two weeks on a regular basis.
1.) The main operator
Megaphone , MegaFon Online-Corporate tariff (6 GB / month for 275 rubles). The employer pays.
The city has an excellent LTE signal, the average speed according to the Speedtest results: ping 16; Reception of 16 Mbps; 23.5 Mbps transmission. Outside the city you have to turn on 3G mode.
With the MegaFon network, the ZMI MF855 works better than their own branded router Megafon MR100-2 (Yota Many). The signal is stronger and the speed is slightly higher.
2.) I inserted a SIM card into it several times
Tele 2 . Archival tariff "Very Black" (15 GB / month for 250 rubles).
The city has an excellent LTE signal, the average speed according to the Speedtest results: ping 15; 33.5 Mbps reception; 22.5 Mbps transmission. Out of town with Tele2 is bad.
Due to the fact that Tele2 charges home traffic throughout Russia, it is convenient to use it when traveling around the regions. In Veliky Novgorod, Tele2 also works fine.
3.) A week ago I went to Finland. They have a good LTE coverage area, even in rural areas, but they can cut speeds of up to 20 Mbps. But unlimited for 1 euro per day. Virtual operator
Saunalahti (network operator Elisa).
4.) I also used a router in Berlin a week ago. Virtual operator
Aldi talk (network of operators E-Plus, Medion). I did not even switch to 3G mode, everywhere LTE. The reception speed in the region of 10 Mbps. Unlimited daily rate for 1.9 euros.
P.S.
None of the listed operators are involved in marauding like Yota and TTL does not track. That is, the Internet is distributed from the router without speed limits.
Post has been editedHejer - 12.08.16, 16:16