Coverage in Poland?

[Derko Drukker]

For citizien-science purposes we deployed several low-cost air quality sensors in The Netherlands using NB-IoT and a T-Mobile SIM-card.
Will such a configuration work in Poland?
Is there a way I can check T-Mobile coverage without going there? A bit like the LoRa TTN-Coverage Map?

[Noah Marx]

Unfortunately there is no interactive map for the coverage of NB-IoT in Poland.
However, T-Mobile Poland has published a press release in which they announced the nationwide coverage (coverage of 94%).

They also published a map where you can get an overview of the coverage in different regions: