How long does it take to send a short message to a group?

You just need to call the customer service center. For example, call10086-each province may be different. I don't understand communication. Go to manual service. Let that person help you solve it. If not, go to the business hall of China Mobile or China Unicom. Don't worry, it should be solved soon. Another way is to log in your number online. Then modify the business. There are only three methods I know. I hope they are useful to you.