NB-IoT (Narrowband Internet of Things) technology is a direct competitor to LoRaWAN and SigFox and has a few advantages:
higher speed 25.5 kbps up and down link
single GSM cell can connect to up to 100 000 NB-IoT nodes
single GSM cell can cover up to 10-100km rural and 1-10km urban distance
can work up to 10 years on Lithium 3V battery if less than 200 bytes are sent per day
Note: All GSM cells which work with LTE can also support NB-IoT, but this requires new protocol installation and licensee fee, so not all operators provide it by default. You have to check with your local GSM operator if he offers NB-IoT. Also SIM card must have this protocol enabled. SIM with LTE may or may not work with NB-IoT, this depends on your operator.
NB-IoT-BC66-ANT has GSM antenna included. NB-IoT-BC66H has EXT1 and EXT2 headers soldered
Distance between EXT1 and EXT2 = 22.86 mm (0.9" ) Distance between EXT2 and EXT3 = 2.54 mm (0.1")