At least in Spain you can ask to be in the Robinson list and then, no company can call you for advertisements or offers unless you're a client of them. AND, in

At least in Spain you can ask to be in the Robinson list and then, no company can call you for advertisements or offers unless you're a client of them. AND, in Spain is against the data protection law to do marketing calls from mobile phones if you're not their client. So they can get into trouble if they do. You can always set you're phone to ignore calls, but this doesn't avoid the call to reach your phone. However, the robinson list does. "Is an opt-out list of people who do not wish to receive marketing transmissions" https://en.wikipedia.org/wiki/Robinson_list https://en.wikipedia.org/wiki/Robinson_list