 SAN DIEGO, Aug. 19, 2021 GLOBE NEWSWIRE -- GBT Technologies Inc. OTC PINK: GTCH GBT or the Company, is now testing - Near Vertical Incidence Skywave NVIS Antenna Technology for its Infinia long range communication. The NVIS technology is targeted to assist with dead zone coverage. Typical HF radio waves reach very long distances but there is the challenge of covering the skip zones. NVIS Vertical Incidence Skywave propagation is a type of ionospheric radio transmission that can be used to fill the gaps between line of sight and longer distance skip zones that are used at HF bands; especially, with rough terrain and geographical obstacles. 