Buses that take you from the airport may have a free wifi for passengers.
Trains have a free wifi for passengers.
Luovi and Joensuu
We have a good Internet connection for participants in Luovi, offered by our partner Elisa. You can use it as much you want for free. In Joensuu, there are some free wifi spots to use.
There is a fairly good free wifi in Helsinki, but the quality of the connection may vary depending on the location.
In case you want to buy a prepaid sim-card for your phone:
Finland has quite low rates for data and sells real unlimited packages on prepaid. The ubiquitous R-Kioski chain is the most popular place in Finland for buying prepaid products, especially because R-Kioski outlets always have the best discounts.