There are telecommunications networks in the refugee camp like: Airtel, Tigo, Vodacom and Halotel. The most popular network is Vodacom.  Unit credits are sold to the refugees in the different corner of the camp.  And also the transaction of the currency is done by these same seller of call credits.  Refugees use the M-pesa, Airtel money, Tigo Pesa and HaloPesa network systems.

Nyarugusu refugee camp
Men