By using the frequency tuneable RF interfaces, it is possible to make a further reduction in the number of RF interfaces needed to cover a large number of possible different operating bands. Because the system employs the processor multiplexer and the antenna multiplexer, it is not necessary that each RF interface is tuneable for all possible bands. The main reason for this is that the bi-directional processor will, in most cases, be free to determine which bands will be used inside the vehicle, within the constraint that the local bands must not be the same as any external bands in use. When there are at least four bands to cover, it becomes sensible to provide frequency tuning capability for at least some of the RF interfaces. For example, when there are four bands to cover, there can be two RF interfaces with: (i) one being tuneable across each three bands none of which is the same as that for the other RF interface; or (ii) both being tuneable across two different bands, none of the bands being the same. The possible reduction in expensive components such as RF amplifiers is then even greater when a very large number of bands are to be covered.

In the embodiments of the invention described above, the local wireless communication device is inside a passenger compartment of a road going motor vehicle, here a car, for conveying at least one passenger. The electronic device may be a hand-held device, for example a personal communication device, for example a mobile phone, a tablet or laptop computer or any other type of hand-held device. The invention is, however applicable to other types of electronic device, including those permanently connected to the vehicle as part of the passenger compartment or instrument display and also to different types of vehicle having an internal compartment for conveying at least one passenger.