Abstract: The invention proposes a control device for an electronic apparatus of the type which consists of a control member (60) which has at least two opposite top lateral selection zones (62, 64, 66, 68) to which a control force can be applied and each of which is associated with a bottom actuation portion which is able to cooperate with a triggering member (26) associated with an electrical switch (28), characterized in that the control member (60) is produced in two parts (80, 82), a first top part (80) of which carries at least said two lateral validation zones (62, 64, 66, 68) and a second bottom part (82) of which carries at least said two bottom actuation portions and has a central stud (84) which passes vertically through the first part (80).

Abstract: A method of synchronizing a mobile terminal in a mobile radio network in which synchronization of the mobile terminal takes place only after determination of the best cell by means of a measurement campaign requests synchronization of the mobile terminal in order to communicate with a control station, verifies that a measurement campaign has already been effected and that the time elapsed since that measurement campaign was effected is less than a predetermined validity time interval, and synchronizes the mobile terminal to the control station.

Abstract: A self-disabling device for a portable terminal used in a mobile telephone network includes a register holding an identification number of the portable terminal and a buffer memory for temporarily storing short information messages transmitted by a control station of the network. One message contains a list of identifier numbers of terminals used fraudulently. A comparator compares the identifier number of the terminal with each of the identifier numbers in the list and transmission of calls by the portable terminal is disabled in response to a positive comparison by the comparator.