The same thing happened to my Mom when she switched to Android this past Christmas. The solution in that case was to get her to connect her old iPhone to the I

The same thing happened to my Mom when she switched to Android this past Christmas. The solution in that case was to get her to connect her old iPhone to the Internet via Wi-Fi, and then disable iMessages. I assume that you would need to disable iMessages on all your iDevices in order to remedy the problem.