Hi everyone! We have an upcoming cruise and my DS14 would like to try out the tween/teen clubs. On previous cruises, we were always all together or DS would be in the younger kids' club without check-out privileges, so we never really needed to call or text each other onboard. I am technically challenged! We all have iPhones and AT&T - can we just text each other onboard? Do we turn on international calling, buy an onboard wifi package? I just want to make sure he can text or call me when he leaves the club so he knows where to meet us. Thank you for any info and advice!