In the early days of the mobile communication era, national network agencies auctioned frequencies to mobile communication operators with the highest bid. Beforehand, each network operator was assigned a separate frequency for use. Therefore, the current legal situation regarding the acceptance and use of hand-held interceptors is as follows: in the GSM frequency range, only the mobile network operator has the right to use the frequencies that have been auctioned in advance, and therefore has the right to operate the mobile phone.However, these laws differ between EU and non-EU countries. In France, for example, cell phone jammers can be used in cinemas, theatres and public gatherings.

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