@choptliva wrote:
I have enabled data roaming, yes.
which phone do you have?
you shouldn't have any problem with "roaming" in Canada or elsewehre in the world if data roaming is enable... unless some bands are not available on your device. (the 700MHz bands are really usufull in some rural part of the USA and some part in Canada to get the best coverage).
I do have some issues sometimes on the 401 between Montreal and GTA... but that's with all providers (my co-worker on Bell has issues too). But besides that, me and my wife never had any issues in Ontario (ex in the GTA) or for all of our travels in the USA (Mainly Buffalo, Syracuse, Net York City, Boston, Albany NY, San Francisco, Las Vegas... ).
This was mainly with iPhones (6s, 7 or X).
I've recently went to Las Vegas and I was using heavily my device during that time... data and calls were perfect (somtimes on T-Mobile... other times on AT&T).... speed were not extremely fast... but it was most of the time in the 15-20mbits range minimum.