Re: Do these cellular amplifiers work for all cellphones?

On 09/04/2022 16:16, gtr wrote:
> Why would it be illegal to listen to ANY signal that is over the air?

In this case, it is because they retransmit the signal in the vehicle.

However there is an also expectation of privacy.  The default UK 
position is that you need a licence to receive radio transmissions, 
although there are some exemptions.

Even the US makes it illegal to listen on cellular frequencies, even 
though other frequencies, including the police, were open.

I don't think either country has changed its legislation to reflect that 
cellular systems are now encrypted.