Warning
We cannot guarantee that the offer described here is still available. The information that follows is from July 2024
T-Mobile and Orange are the biggest carrier in Poland, and they have some good options but the amount of data is limited but they offer some bonus and the amount of data available can reach up to 450Gb/Month that is enough for us to work.
Orange offers an interesting option called orange flex that is basically a subscription model, you download the app, choose your subscription plan and you are done. It is possible to do with eSim and if you stop by an Orange store, they will give you a sim card.
We decided to go with T-Mobile
Final Setup
Carrier: T-Mobile
Price: 15€/month
Data limit: 400Gb/Month