Vastauksen tähän kysymykseen jakoi raastupa
You can activate one PUHE -package per one Prepaid subscription. It costs 6,90 e and enables you to place calls to every Elisa, Saunalahti or Kolumbus -subscription with no separate cost.
I can't see any reason to have numerous PUHE -packages activated simultaneously i.e. on separate Prepaids, since you can call any Elisa network customer for 31 days for the nominal cost.