Is it legal for a mobile company to turn off the text messaging function on my phone without permission?

As a service provider, China Mobile is fully obliged to inform customers of its service-related rules (including the issue of sending text messages above). China Mobile can inform customers through customer service, official text messages, business hall reminders, etc. However, it has not Of course, it has the responsibility to make any disclosure. In foreign societies with human rights, such a situation is a sure win, but it has never been seen in China...