In its purest form, bingo involves a dealer calling out numbers as players check whether they have the winning combination. Players cross out numbers on cards and shout 'Bingo!' when they get the full combination. In casinos, it is played with cards which are discarded as the dealer calls out until a winner is found.
Armenia is a country with one of the oldest histories in the world. The mobile and online gambling situation in this country is a bit complicated, with it being banned in the country, but also with land-based casinos offering online services in other countries. Still, with all the bans, it's reported that mobile gambling is gaining popularity.