To play craps, you need nothing more than two dice (and players, of course). A dealer collects bets on the predicted outcomes of a single toss or number of rolls, then casts both dice in one go. Other than knowing the faces of a die, one needs no other skill to play craps.
South Sudan is among the youngest countries in the world, having seceded from Sudan only in 2011. Currently gambling is not regulated due to the serious political instability, and it is not clear whether mobile casinos are legal. That being said, there is little to no access to internet, which impacts mobile gambling.