Does anyone know how to get advertising information when I get to a place?

I know at least two kinds. One is the operator, who can know that you have entered a certain area through the base station, thus triggering short messages. The most common thing is that xx Mobile welcomes you. One is SMS in the community, which is a portable device. Generally, it can be installed in the car and can send short messages to a certain range of mobile phones. When you enter its range, you can trigger a short message.