Global Cellular IoT Gateways Market By Type (NB-IoT, NB-LTE-M, 4G, LTE, 3G, 2G, 4G, 5G, and LTE-M), By Application (Healthcare, Telecommunications, Military, Retail, and BFSI), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029