Viettel Group is going to pilot 4G technology in October, said Do Minh Phuong, deputy general director of the Viettel Group. Plans call for Viettel to set up 12,000 4G base transceiver stations no later than in the first quarter of next year, he added. The 4G network will first offer services in communes, followed by districts, provinces and cities. However, Viettel users will have to change SIM cards if they use 4G services, though phone numbers will remain the same. Le Dang Dung, Viettel deputy head, sent a proposal to the Ministry of Information and Communications to grant a licence for 4G services for Viettel this year, which it…