What is the reason why Henan Unicom can still receive short messages when its mobile phone number is down?

Under normal circumstances, if your mobile phone stops in one direction (some are also called: overdue semi-stop, high semi-stop, etc. ), you can't send text messages and make phone calls, but you can receive text messages and answer phone calls. If it is a two-way stop (some are also called: overdue half stop, high half stop, etc.). ), can't send and receive text messages, can't answer the phone. Due to different local conditions, it is recommended to call the customer service hotline 100 10 or consult in the local business hall.