In my family, two of the four phones have been moved to the new network. The other two are saying "While your current phone isn't compatible with our new network, we anticipate that your phone will be compatible soon." One of the two will likely get replaced, but I just bought the other one 'for' Visible and it was compatible with the old network when I bought it.
When I asked the chat about it, they reiterated the same statement, but no idea 'when'. Just curious if anyone has heard any more about the timeline regarding increasing device support.