How to send real estate messages in groups?

How to inform the local residents of real estate development activities in residential areas, and do three things well:

Make the cell phone numbers obtained by consultation and the cell phone numbers of all residents in nearby counties into spreadsheet excel format.

2. After opening the soft part of this tool, the number is imported, the short message content is also written, and then sent, and it takes 6 seconds to arrive, which is very simple. Those who are interested in buying a house will come and have a look.