SMS reminds me that I owe money, but I can still make phone calls and open data online. What happened?

The functions of making phone calls, surfing the Internet and sending and receiving short messages will not be affected if the mobile phone is not stopped. However, if it is stopped, it can no longer surf the Internet, make phone calls and send and receive short messages, and it can only be restored by paying a fee.

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IPhone SE has been officially released, please click/sabmm for the latest news about the contract machine;

4G primary and secondary cards:/02 UPY;