VympelKom OAO (JSC Vimpel-Communications) is a Russia-based provider of wireless telecommunications services in Russia, Kazakhstan, Ukraine, Tajikistan, Uzbekistan, Georgia and Armenia under the Beeline brand name. The Company is active in Kazakhstan under the K-mobile and EXCESS brand names and in Armenia under the Armentel brand name. Vimpel offers its services through global system for mobile communications (GSM) and digital advanced mobile phone system (D-AMPS) wireless networks. The wireless services include voice telephony service and value-added services using technologies, such as unstructured supplementary services data, subscriber identity module toolkit, cell broadcast, wireless application protocol (WAP), general packet radio service (GPRS) and multimedia messaging service (MMS). As of December 31, 2006, the Company had roaming agreements with 541 GSM operators in 204 countries and supported GPRS roaming in 113 countries. It is headquartered in Moscow, Russian Federation.