Abstract: A communication system includes first and second radiotelephones capable of communicating with a telecommunications network. The second radiotelephone is capable of remotely acquiring at least some of the identification information of the first radiotelephone and is further capable of acquiring connection parameters from the first radiotelephone. The communication parameters may include information relating to any of: the strongest radio channel; available frequency bands; and radio channels in use. The acquired parameters are applied to effect a connection to the network, without going through channel searching procedures. This overcomes the need to physically transfer subscriber identification modules (SIMs).

Abstract: In a typical radiotelephone system, such as GSM, each radiotelephone or cellular device requires a subscriber identification module (SIM) in order to communicate with a telecommunications network. Generally the SIMs are removable from a radiotelephone and may placed in another radiotelephone, which thereby connects to the network using information contained in the SIM. This, however, can prove extremely inconvenient for the user having two or more radiotelephones. One way around this problem is for the user to have just one SIM, and to physically transfer the SIM to whichever radiotelephone is currently in use. This, however, is cumbersome since first the power must be switched off, the SIM must be removed, the SIM inserted into the new device, the new device must be powered on, and finally the new device must go through the initialisation and network authorisation phases.

Abstract: A method for navigating an object, such as a radio telephone, from a starting point to a destination along traffic routes that are contained in an electronically stored traffic route map and are in the form of routing points. The routing points are assigned routing values which, starting from the destination, either only increase or only decrease as the distance from the destination grows larger. The object is then navigated by following a path of routing values which only decrease or only increase.