Just try to remember that you're dealing with the 4day long weekend that just passed, my SIM card took a little while and there wasn't a long weekend should be arriving soon
As previously stated you could get a local Sim or if phone allows an eSim but try customer service and see if there's a roaming plan that includes Mexico
You can change your plan and your phone's while still keeping the same login therefore you wouldn't lose any money out points that you haven't spent as of yet. As for a newer phone, I prefer to buy mine straight from amazon.ca as there return policy ...
The phone # that you want to keep has to remain active with your old service provider in order to port the # over... Who was your old service provider? You'll either have to setup your old sim to stay active for an extra month or if your were with Ch...