Joke Collection Website - Public benefit messages - How does Unicom send text messages to check credit?

How does Unicom send text messages to check credit?

You can log in to Unicom's online business hall/homepage, and click phone bill inquiry > account balance to inquire about the current credit limit of this number.

Tips: As some provinces don't support this way to inquire about credit, if you can't do so, you are advised to consult the local manual customer service or business hall.