Domestic or International Radials:
Around 3000 missed calls have been delivered as a spam to Unitel Angola subscribers in a less one day period. 271 subscribers returned calls to fraudsters numbers and had balance decreased .
Unitel fraud team realized test calls , call traces to find more numbers from Congo doing the same fraud . A range( 24201180770X) of 100 Congo msisdns has been blocked on Unitel Core network .
Unitel Angola Subscribers
Forums: Communication Fraud
A range of 10 Numbers from Congo has delivered aalmost 3000 missed calls to Unitel Angola Subscribers in a less 24hours period.
Fraud Method :
Abuse of network, device or configuration weakness
International Revenue Share Fraud (IRSF)