Thanks for being a good sport. Sorry I couldn't help pointing out a few things, hope they come across as good teasing. I wouldn't use those words; just that we all know some of this can really take time (like you said, need to cut through the BS), and some of us do this as a hobby or to satisfy curiosity.
You cannot be a bad parent/person for providing your high school son with a European trip, and trying to figure things out like this for him.
I thought ecs0013 gave an excellent suggestion regarding Airalo and Wi-Fi calling through Cricket. If you follow along and click on "39 Countries", yes, you should be able to verify Ireland and United Kingdom.
You asked about buying locally, and if you also follow along (and scroll down on the traveltomtom website), you should be able to find information about buying a local SIM at various airports such as Dublin.
If your son needs to be able to call local directly without going through VoIP, Three UK may be the best choice. It's closest to buying a local SIM (it's from Three *UK* -- some Orange products have a little better ratings, but Orange is based in France, though maybe that does not matter anyway), but in the US instead of at an airport. But as you saw, it probably wouldn't work as well as Airalo, and you really need to be sure to set it up (and verify your allocations in the app -- see Caasi's post in "Top reviews") before the trip.
Airalo + WhatsApp suggested by cleocatsky is also excellent. You will just be sure to check Airalo on the Cellular Data screen. If you have WhatsApp on both his and your phone:
- Between you and your son, you can use WhatsApp. No need to figure out Wi-Fi calling through Cricket.
If he needs to call a US number (that's not registered with WhatsApp), maybe he can have you relay the call, or install TextNow? - Given how ubiquitous WhatsApp appears to be in Europe, he can reach just about any local business.
(It's not clear how/if iMessage would work without Wi-Fi calling, even though the SIM [with the phone number iMessage registered with] is not removed. Probably better not to consider iMessage if you will not figure out Wi-Fi calling through Cricket. I am not sure people are reporting the same things:
https://old.reddit.com/r/iphone/comm..._while_abroad/
https://old.reddit.com/r/Visible/com...hen_traveling/)
By the way, buying a SIM at an airport isn't necessarily problem-free. For example, the review by Mike B states: "My brother and his wife at first bought SIM cards for their phones (another brand) at the Schiphol airport in Amsterdam. They had so much trouble trying to get their phones to work that they put their original SIM cards back in and used an overseas plan provided by their United States carrier that charged $10.00 a day."
https://www.amazon.com/TSIM-Destinat...ustomerReviews
At some point, getting Verizon temporarily is worth considering.
Bookmarks