Do not use email through your carriers assuming there is service along the way. Disable your data for rme wry thing. It's very expensive because you use lots of data. I know from bad experiences and 500 dollar mistake. Instead use onboard wifi for texting and email. And use Skype via wifi for calls. Costs pennies. Just download the Skype app before you leave and put a few dollars on your account for the calls. We do it all the time, without video, simply as a phone. Both on my iPhone and iPad. Works great