Do I need to do anything to my phones once we arrive at destination? Purchased international plan 2 phones.
Make sure roaming is enabled. Since international service plans do NOT have unlimited data, I recommend texting only in SMS mode to avoid burning up your data rapidly. RCS texts and texting via iMessage is encrypted and uses data - they are not "traditional" texts like the older SMS technology which is unencrypted. As far as I know, there is no purchasing extra data if you run out.
The following link may be useful:
