There are long queues, there is no board with numbers, and the queue number is pronounced exclusively in Mongolian. If you need a SIM card, it's better to contact the guy with the tablet in the same building, rather than standing in line.
MobiCom is an excellent operator. The sellers in the salon, even using a translator, took a position in Mongolian or English, there were no other options. The guard was wonderful and knew Russian, which helped in purchasing a SIM card.
The overall impression is positive, but I would like a little more customer-oriented. After all, there is no problem to read what the client wants and write an answer.