Vietnamese carriers EVN Telecom and Ha Noi Telecom have agreed a VND 6 trillion (USD56 million) 3G technology deal, reports Viet Nam News. The two sides will invest in building 5,000 base stations to cover 50 percent of residential areas within nine months after receiving their licence. EVN Telecom already has more than 3,000 base stations nationwide and Ha Noi Telecom 1,200.