Garmin never sold subscriptions alone here. It comes integrated with a cable GTM 26 or 36 along with some new gps models. Only recently Garmin started selling the cable (GTM35) singly gps, with the official subscriptions. Certainly we have some peculiarity in the transmitted codes and signature, since it's a new system and penetration of Garmin was quite restricted. Such limitations and restrictions must not be present in Europe and the United States due to the need to maintain compatibility with large amount of "old" devices..