After less than one year, NTT DoCoMo has closed its Narrowband Internet of Things (NB-IoT) network in Japan. NTT is a carrier with a wide range of experience testing IoT networks, both licensed and unlicensed. There is no indication of this being part of a bigger trend of NB-IoT falling out of favor, nor even that NTT may not relaunch its network if the economic situation behind its decision changes.
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