im leaving for costa rica tomorrow and would like to turn off ALL data AND telephone. i dont want any connection at all, but i would still like to use my camera, calendar, notepad, etc. how do i turn off EVERYTHING? But I would still use wifi to browse internet(not data)...is that possible? i know airplane mode will turn everything off; even wifi. so my question is, how do i turn off all data/phone and still use wifi to browse internet?