 One of the three biggest Russian mobile operators, MTS used the CBOSS billing solution from 1998 until 2004, when it switched to FORIS
OSS-IN from STROM Telecom company 

In 2004, CBOSS was rated as the 11th biggest IT company in Russia by .In 2006, CBOSS Corporation was recognized as the #1 IT-provider of integrated solutions for telecommunications in EMEA by Informa Telecoms Group 

In February 2004, CBOSS acquired the online billing solutions subsidiary of Fujitsu Services Oy and its product - "rtBilling" (CBOSSrtb) prepaid billing system.This system was used by several mobile operators