How does HR send mass recruitment SMS?

The mass recruitment SMS of human resources is actually very simple. If there are few people, you can send them one by one. But personally, it is very troublesome. If there are many people, you can use some auxiliary tools to help you. You can send it with one click. The point is that there is no limit to the number of people. If you have a lot of contacts, you can try an assistant tool like Reid's assistant to send it, so as to improve work efficiency.