Ericsson has signed a contract with Angolan mobile operator Unitel to expand its GSM/W-CDMA network over the coming three years. The contract includes a comprehensive network performance partnership agreement, to strengthen Unitel’s network quality. Under the agreement, Ericsson consultants will perform network improvement and optimisation services for the core, radio and transmission networks. For the continued expansion of Unitel’s network, Ericsson will deliver services including network design, network deployment, systems integration and network support. Unitel reported a total of more than 4.5 million subscribers at the end of December 2008. It launched its GSM services in April 2001 and now covers all 18 provinces of the country and more than 100 municipalities. In 2008 the company introduced 3G/3.5G services based on W-CDMA/ HSPA technology.