Originally Posted by draver

No need to apologize, but some misstatements caused me to post. You do not need to turn off LTE for the IMS function, T-Mobile is not only 3G in Canada & Mexico, $1/Gb, etc. We all are entitled to our favorites and a bit of promotion, but others see our comments and use them for guidance. An advantage Fi DOES have is the included roaming calls. Granted TM Data Pass does also, but you're already paying for Fi and it is convenient. I do see that Three UK simcard on Amazon currently has 4Gb, 30 day, Unlimited Calls/Texts for $17, but you'd have a UK phone number. There are probably lots more deals than I am aware of for travelers, and this forum is a good resource.