How to open the caller ID of Unicom by SMS?

Due to the different ways to open the caller ID of packages in different cities, take Henan as an example: send a short message KTLDXS to 100 10 to open some packages. Some need to be opened through the business hall or Unicom 100 10 customer service hotline, and some packages need to be operated through the online business hall (such as 4G free combination packages). It is suggested that you can directly contact the customer service hotline 100 10 to find out how to open the caller ID of your package.