Joke Collection Website - Public benefit messages - Why do mobile phone cards that have been used for so many years receive short messages that need to be activated?

Why do mobile phone cards that have been used for so many years receive short messages that need to be activated?

It's real-name authentication, right? This happens on the old hand's cell phone number. Just go to the local business hall and seriously apply for your real name, and bring your ID card and mobile phone.

Is it from 10086 or 10000? If so, there should be no phone bill to stop, right? If you still don't know anything, just call customer service and ask.

Xy is desired.