The legality of jamming, especially GSM jamming, has been discussed on several occasions within the European Union. These discussions have made clear that member states of the EU neither permit nor wish to permit radio communications to be disrupted by jamming devices operated by members of the public.
It is impossible to construct jammers that comply with the R&TTE or the EMC Directives, which means you cannot legally operate a phone jammer in any of European Countries, even if the manufacturer says that it does comply.
