Wi-Fi mainly works on the territory of Armenia. Since part of the road from Yerevan to Tbilisi passes through a mountainous area where mobile communications are poorly received (in some sections, communication may not be available at all, and in some it falls under Georgia's roaming), it is natural that the Internet may not work stably. In addition, this may be due to the fact that some passengers watch movies, download large games and thus occupy the main traffic.