Can't you send a message without the phone bill?

It doesn't have to be like this. If it is post-paid, users will use the service first, make an appointment for SMS or other value-added services, and then pay the phone bill next month.

However, now mobile has introduced some prepaid users of star-rated services, and they can also owe a certain amount. Therefore, if there is no phone bill, it depends on whether you are a post-paid user or a mobile star user. If there is, you can owe money and send a message.