NB-IoT SIM Card: A Plain-English Guide to Narrowband Connectivity

Most are not. Real deployments end up in basements, under manhole covers, inside meter cupboards behind three layers of brick, in fields, on rooftops, or bolted to something that will never see mains power. These are the environments that NB-IoT was invented for — and the reason the NB-IoT SIM card exists as a distinct product.
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