We have thousands of them remaining today. And usually buried in sand or in the ocean. That would be too expensive to remove because it’s a blockhaus (quite sturdy) and the sand + salt ruin the tools and engines used to destroy them.
And more importantly: it’s part of our history. We still keep our old castles so why not keep that. It’s a good reminder too.
Here a map of more than 2000 remaining blockhaus : https://www.cestenfrance.fr/cartographie-du-mur-de-latlantique/
You buy something or a service and give them the authorization to use your phone number for a later usage.
So the telemarketing will be only with companies you’re previously authorized (think contracts renegotiating, new offer proposals, survey, feedback…)