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. https://theinternetofthings.report/Resources/Whitepapers/00828509-56fb-40d2-836e-4692853bda13_narrowband-iot-delivers-data.pdf
whitepaper
NARROWBAND IOT DELIVERS INSIGHTS FROM THE LARGEST NB-IOT INDOOR MEASUREMENT CAMPAIGN
Deutsche Telekom’s NarrowBand IoT (NB-IoT) network has proven its capabilities in the largest NB-IoT indoor measurement campaign conducted so far, achieving a 100 % attach rate above ground and a 95 % attach rate in basements. This meets and even exceeds the expectations for NB-IoT to perform better than existing cellular technologies, such as 2G / 3G / 4G. Once attached to the network, data transmission for each measurement cycle was possible in nearly all cases (99.75 %). DOWNLOAD