The Arduino MKR NB 1500 adds the Narrow Band IoT and LTE CAT M1 networks to the Arduino platform. It is a development board which contains the Ublox SARA-R410M and the Atmel SAMD21 microcontroller, designed to integrate the core's low power-consumption and high performance with the Arduino's ease-of-use.
With the Arduino MKR NB 1500 and the MKRNB library you can connect to the internet over a GSM network. The on board module operates in 4G, using LTE Cat M1 or NB1. The Arduino MKR NB 1500 has a modem that transfers data from a serial port to the GSM network. The modem executes operations via a series of AT commands.
This board is designed for global use, providing Cat M1/NB1 deployed bands 2, 3, 4, 5, 8, 12, 13, 20, 28.
NB-IoT and LTE-M are very new services. Ask your mobile operator about availability of SIM cards, coverage, frequencies used and login procedures before you buy the product.
More information is available on the website of Arduino.