Dual-SIM phone setup

[DonJuane]

OK, looks like I guessed it right if your phone is an iPhone 11 and you are on iOS13:

https://support.apple.com/en-us/HT209044

To use two different carriers, your iPhone must be unlocked. Otherwise, both plans must be from the same carrier. If a CDMA carrier provides your first SIM, your second SIM won't support CDMA. Contact your carrier for more information.

If you have an enterprise or corporate cellular service plan, check with your company administrator to see if they support this feature.

So for this reason if you are a Version customer and go the eSIM route, this locks the phone to two numbers from the same carrier.

*** POST UPDATED: After re-reading Apple help website.

It appears that the dual SIM feature only benefits customers who want two Verizon lines/numbers. To do the country switch if you want two SIMs you will need to go to a phone such as BLU with two actual SIM card slots and then they will need to be either the Verizon CDMA style of phone or the "Rest of the World" GSM style of phone. So going with Verizon would logically limit the sharing of SIM cards in "lesser capable" or "designed for one architecture" phones. In the case of the Apple 11, I'm betting the only solution is to go back to an actual physical SIM and then pop "out" the Verizon and "in" the MoviStar SIM when you are in Mexico and perhaps put the Verizon SIM in a dedicated Verizon inexpensive phone you stick in your back pocket or keep on the dresser.