Is the NB IoT network available in my country?
The map below shows NB IoT networks around the world as of March 2019.
As of March 2019 GSA had identified:
140 operators in 69 countries investing in NB-IoT networks
88 of those operators in 50 countries had deployed/launched their networks
See list of global telco's with NB IoT switched on and their bands and MHZ ranges by clicking here