Why is there no constant connection to NB-IoT?
NB-IoT is best suited for stationary devices since it does not support seamless cell handover, which means that the connection has to be re-established again when the devices attaches to a new cell network tower.
1NCE Shop

Buy the 1NCE IoT Lifetime Flat now!

Visit the 1NCE Shop and start connecting your IoT devices easily. Simply order your SIM cards, choose the desired type of SIM card and fill out all required forms. After the payment has been approved you get your cards within two to three business days.