Mobile internet for non-Croatian citizens

[xlr]

1. You have Tele2 network,it's the cheapest one here,and you can buy sim card for 50 kn (6.70 €) and you get 50 kn on card to spend...

..but Tele2 has the worst signal coverage on sea (even signal along the coast is bad in lot of cities - for exapmle: in Pula ). However, in this scenario you should skip Tele2

AM wrote you the best solution for your needs - T-Mobile (Simpa web'n'walk tariff):
http://www.t-mobile.hr/eng/1/10-10-10-00-00.asp