What does it mean to unsubscribe from the SMS bill?

Unsubscribe from SMS bill is to tell you what package your mobile phone number has set up.

For example, if you don't want to use the package, call 10086 and tell the customer service that you want to cancel the package. After the customer service cancels it for you, it will send you a message later, saying that you have successfully unsubscribed from the package.

So when you receive this message, it's all the original package set by your mobile phone card. If you don't want to use it, or don't think it is necessary, you will deduct the money if you don't cancel it, and then cancel it. After the cancellation, there will be an unsubscribe message and a bill reminder, which tells you that the cancellation has been successful.