Please can you guys help me with a place or resources/tutorial/roadmap even a hint, where i can learn Telecom Billing fraud.
IP PBX /PBX hacking and roaming fraud
Please im in need because im from 1 of the poorest country in AFRICA
IP PBX /PBX hacking and roaming fraud
Please im in need because im from 1 of the poorest country in AFRICA
