Viettel Network Technologies Center (VTTEK) - a member of Viettel Group, is the pioneer in researching and developing 3G, 4G LTE, 5G technologies, core application solution (Online Charging System, Short Message Service Center, Color Ring Back Tone, Location Based System, etc.); core access solution (Base Station Controller); core switching solutions (Mobile Soft-switch Systems, Packet Switching Core) and mobile testing solution (Mobile Testing System). With product quality and customer satisfaction at the heart of our business, VTTEK has gradually strengthened its position in the field of telecom equipment R&D. VTTEK solutions have been deployed both in Vietnam and overseas markets such as East Timor, Cameroon, and Burundi. With highly-qualified and experienced workforce and modern infrastructure, we are committed to providing our clients with the best equipment at the most competitive prices. Our Vision: focusing on telecom network R&D to become a leader in providing telecom equipment to service providers worldwide. Perspectives: - Combine the power of telecommunications services with the power of information technology to create competitive advantage for Viettel Group.- Increase the development of R&D activities to meet new technological trends worldwide. - Provide high-quality products at the most competitive price to maximize profits for operators.