O2's Roaming partners

[AWE]

Does anybody know who aree O2's roaming partner(s) is/are in Finland?

I have the phone set to "automatic" and it always finds Telia but this network seems to have substantial gaps in its coverage.

[Enlli]

Don't think they produce lists these days

Just set things to manual and see what works. 

[pgn]

The largest telephone operators in Finland are Elisa, Telia, DNA and Moi Mobiili. And don't worry about any that come up with "Forbidden" next to them on your phone in a manual search, @AWE - when roaming, any network that you can get connected to is good 👍🏼