As for Finland:
FICORA actively intervenes in competition problems detected on the broadband
and telephone markets, which enables new and innovative service providers to
enter the markets. For consumers, this means versatile, high-quality and
affordable telephone and broadband services.
https://www.viestintavirasto.fi/en/internettelephone.html
Fixed Broadband
As of February 2017 you can pay about €20 per month for a 20 Mb/s ADSL
connection. A 50 Mb/s connection may be €25 per month, a 100 Mb/s
connection may be €30 per month, and 1000 Mb/s may be €40 per month.
Mobile Broadband
As of February 2017 you can pay about €15 per month for a 21 Mb/s 4G
connection. A 50 Mb/s 4G connection may be about €18-24 per month, a 100
Mb/s 4G connection may be about €23-30 per month, and a 300 Mb/s 4G
connection may be about €50 per month.
http://www.expat-finland.com/telecommunications_and_media/isp.html#prices
I'm on mobile broadband prepaid. I pay 19,90 per month for 50 Mbps connection
unlimited. Real speed is 10--16 Mbps.