Mobile operator: technology GSM/GPRS/HSCSD/UMTS, mobile services, tariffing, point of sales, billing, provisioning

Internet service providers: technology wireless/ADSL/ISDN/satelite/networks/VoIP, customer care, billing, order management, authorization

Landline services: billing, tariff calculations, business solutions

Electronic payment transaction services: billing, point of sales IP telephony – data warehousing

Wireless – connectivity, billing