The wide spread distribution of mobile telephones increase very strongly, and in specific areas explosively and it is assumed that a large part of the population in the near future will possess a mobile telephone, in any case in industrialized countries.

The airline companies on the other hand take actions to ensure that all mobile telephones on board are shut down to avoid the risk of the mobile telephones influencing the very sensitive electronic equipment in airliners. Today this is done substan- tially by the airline personnel instructing the passengers to ensure that their mobile telephone are switched off during the flight.

Even if most of the passengers understand the danger the airplanes are seriously exposed when bringing an activated mobile telephone on board. Avon after having been explained more clearly the situation and the danger one cannot be ensured that somebody put his mobile telephone in a pocket or a bag in an activated state before takeoff, such as by distraction or forgetfulness. As such air flight passenger based on distraction and old habit may pick up their mobile telephone, activate the it and make a call.

So far it is not known that disturbances in the electronic equipment due to influence from mobile telephones have led to serious accidents, but the possibility exists and there are experiences from flights where the equipment has been disturbed.

Hazardous influence on sensitive electronic equipment also exists in many other connection, such as at hospitals, air ports, construction sites, during rescue operations etc.

With the method and the device according to the present invention it is possible to provide approximately 100 % security on the electronic equipment on board airplanes, against activated

mobile telephones during the flight. This is achieved with the method and the device according to the present invention as described with the features stated in the claims.

The drawing discloses in figure 1 schematically a front view of the device according to the invention in one embodiment and figures 2 and 3 disclose schematically the device according to the present invention in a second embodiment, respectively in an open and sealed condition.- Substantial with the device according to the present invention is that all mobile telephones on board an airplane should be kept with the telephone part 2 and the battery part 3 divided from each other. It will be advantageous if this separation is maintained during the flight in such a way that the owner is not able to connect the parts to each other.

With the object to store the two parts apart or in any case in such a way there is no electrical contact between the two parts, it will be most suitable that the battery part 3 and the telephone part 2 are stored in one pocket each of the device and that the device preferably is sealed with a suitable lock 4, such as an electronic lock which is released after the flight is over.

It may be suitable that the device 1 has a shape like for example a bag, a purse or such comprising two pockets and that the traveller separates the battery part 3 from the telephone part 2 at the boarding control and places those separately in the device 1. Suitably the device may be manufactured in a transpa- rent material, such as PVC in such a way that the owner may see and recognize the parts.

Procedures concerning the method and the use of the device may be defined in different ways. Dependent of which solutions are chosen by different airplane companies respectively airports, it will be most suitable routines also are established in other airports.

For example may the mobile telephone be collected when boarding, arranged in a device according to the invention and delivered back to the owners after the air flight has been terminated. More preferable would be that the owner carriers his mobile telephone locked in the device and that the lock is released at arrival whereby the device may be delivered back to the airplane company or the airport adminstration. Possibly may

the owner release the lock himself in a suitable machine and remove the battery part 3 and the telephone part 2 from the device and thereafter connect the two parts with each other.

The device according to the invention may have a shape like plastic bag and could be vacuum packed and sealed by welding after the telephone part 2 and the battery part 3 in not connected condition have been brought into the plastic bag. The parts may lay upon each other or touch each other in the device, however with the plastic in between. The device may be manufac- tured in such a way that it very easily may be torn off after the air flight, such as by means of a tearing tag. With such a solution the mobile telephone will not assume substantially more space than in a connected position.

It is assumed that a traveller will not brake such a seal to activate the mobile telephone during the flight. Reasons why mobile telephones have been activated so far, generally have been distraction and thoughtlessness. Braking a seal demands such an activation that it will not happened inadvertently.

The device according to the invention also may be manufactured in a material which can be shrunk in such a way that the battery part 3 is connected with the telephone part 2, however without electrical contact, possibly with an intermediate layer or plastics.

The device further may be shaped as a plastic bag having a zipper and with one or two pockets for respectively the battery part 3 and the telephone part 2.

The device furthermore may assume a shape that the surface of the same is suitable for displaying information commercial and such.