Message package worked pretty well on HEL-AGP without the clearly marked non-working areas. On flight back it did not work at all. Surprisingly the flight attendant said wi-fi works only if you pay for it (but not on this flight). She seemed to know nothing about the free Whatsapp. I pointed out they could have announced wi-fi did not work and would have saved me and others for trying many times in vain during the long night.