I'm leaving the country in about 5 hours and I was pretty confident I knew what I was doing was correct when it came to avoiding the steep charges for using data/roaming overseas. Until I read how some people got surprise charges because they messed up? My question is, which method is correct? All I want to do is be able to use iMessage/Skype without any charges while on wifi. 1) Settings, General, Cellular, turn cellular data off, turn voice and roaming to off. Continue using iMessage on wifi. 2) Switch phone to airplane mode, go to wifi, turn wifi on. Continue using iMessage. Or just do both? Thanks for reading!