Diversity of downloading offline maps and choices of maps are truly amazing. Heck ,, I don't even know at least 80% of the maps they are talking about ,,
Go here ,,, at the very top download Mobile Atlas Creator,,, read the help me files ,, select the area ,, then choose from some 20+ map formats ,,
Download Mobile Atlas Creator from SourceForge.net
Choose your maps ,, tiles ,, details ,, and create your own map... Click offline map in the setting in your map program ,, copy the map file from MAC ,, place it under Locus/map or any other map program you might be using ,,, before using,,, under setting click offline map.
It will take getting used to ,, experiment with it ,,, but ,, ah,, free maps,,,, great software ,, fun doing it ,, making your own map.
Now for online ,, when you travel ,, ask your carrier for the MONTHLY unlimited flat rate data plan,, which can be used all over the world ,, SK Telecom, in Korea provides 10 USD a day plan,, so you folks must have it in EEC and USA as well.
300 bucks a month ,, for internet,, EM ,,, etc ,,
Also if you go to APP store,, download free Kakao Talk ,, this allows you free chat ,, free sms ,, you can send large photo and video files to those with same ,, All free, as long as you are online.