LTE-M / LTE cat.0 would be the ideal replacement for a pager. NB-IoT is not meant for mobility. NB-IoT has cell reselection mechanisms, so you can connect to a different base station, but the process is very energy demanding. It is meant to be used rarely, for example when a closer base station activates.
Also, firmware updates for these devices are a few KB typically and occur maybe once every 6 months. 12 MB per year should be enough.
Also, firmware updates for these devices are a few KB typically and occur maybe once every 6 months. 12 MB per year should be enough.
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