T-Mobile Launches Nationwide Narrowband IoT Network | PCMag.com
T-Mobile has rolled out what it says is the first nationwide narrowband Internet of Things (NB-IoT) service. The company says its NB-IoT network covers almost 2.1 million square miles and about 320 million people. In addition to being the first carrier to launch in the United States, the NB-IoT network, introduced on July 19, is also the first such service to launch worldwide with guard bands, according to T-Mobile. Guard bands are unused areas of the spectrum that insulate one signal from another. They let T-Mobile gain more efficiency when using spectrum resources and enable IoT applications to avoid interference from other data traffic.