I don’t have a definitive answer for you but think some context regarding the Boost Infinite subreddit may be helpful to those reading.
Boost Infinite offers 3 different network SIMs:
- The fabled “Rainbow” SIM, which provides DISH native coverage with domestic roaming to AT&T’s and/or T-Mobile’s networks where DISH native coverage is not available. Few phones are compatible with the “Rainbow” SIM and, unless they’ve since purchased a new compatible phone from Boost Infinite and obtained a “Rainbow” SIM, no former Republic Wireless members are using a “Rainbow” SIM.
- An AT&T network SIM. Former Republic members who were migrated from a 5.0 plan have AT&T network SIMs.
- A T-Mobile network SIM. Former Republic members who were migrated from a My Choice plan have T-Mobile network SIMs.
In theory, the “North America Connect” add-on works on any of Boost Infinite’s SIMs. The reality seems more complex, perhaps, explaining the variety of experiences reported in the Boost Infinite subreddit. “Early Access” Boost Infinite subscribers would, generally, have AT&T network SIMs.
The other thing I’ve noticed on the Boost Infinite subreddit is “North America Connect” is reported to work better in Mexico than in Canada. This might have to do with AT&T operating a cellular network in Mexico where it does not in Canada.
Finally, one fellow RWusers member has tried using Republic Wireless by DISH service in Canada unsucessfully:
@mwgardiner, to date, that remains the case on Boost Infinite, correct?
If I were still using Boost Infinite and traveling outside the U.S., I would have a plan B.