I am going to turn on airplane mode and leave it on after I land in Jamaica because I do not want any charges coming through. If I leave WiFi on, will I incur any charges? There is WiFi at our resort. I have a Droid Charge. I am going to mostly use it for music and my alarm while I'm there as I will have my laptop, so if I need to turn off WiFi to prevent any charges that won't be a problem. Thanks!