North American devices are the only exceptions. For North American devices, you may load either Full Coverage of North America or US & Canada. However, other smaller regions will NOT work with voice command.
That's interesting... My nuvi 855 has voice commands and the size of the new maps (and JCV) is requiring either using a smaller coverage map (lower 48 states) or using the smallest JCV file or adding an SD card (for biggest JCV). I never thought that the smaller maps will cancel a feature of the device, that is... sneaky (to put it nice).