Hi we are going to be traveling out of the U.S. and I do not want any roaming data charges whatsoever. The phone is CDMA only. The place we are going will sometimes have CDMA coverage but mostly GSM. So i'm afraid if the phone is one and we hit a CDMA coverage spot things might download data like apps running in the background. So other than turning off data while roaming is there anything else that I should know about like how will i know if some apps are constantly downloading something in the background and how can I stop them. Or does that also stop when I turn off data while roaming. Thanks first smartphone so all this is somewhat new to me.