Thanks in advance.
Vastauksen tähän kysymykseen jakoi hpguru
You need to use a Saunalahti APN: internet.saunalahti
Call number: *99#
The username and password should be blank.
Also for best results, remove PIN code from SIM card. You can do this with your (smart)phone, just setup a SIM from USB modem and remove PIN from phone settings. Then setup SIM back to your USB modem.
Hope this works for you in no time.