Why can't I reply to other people's messages?

First of all, you can check the arrears mentioned in 1 building.

Is your location out of network coverage?

Secondly, you can check the SMS center in your mobile phone (find settings in the SMS program to check the SMS center). If there is no SMS center number, you can't send and receive messages.

To know the SMS center number of your mobile phone card, you can call the customer service hotlines 100 10 (Unicom) and 10086 (Mobile) and ask for the SMS center number at the manual desk. Short message center numbers are different in different regions.

The format is generally+8613 * * * * * * *.

Also, you can find it online, but you'd better call customer service and transfer to the manual station.

If this doesn't work, if you have installed software such as Mobile Guardian (which comes with your mobile phone), you can look at the permission settings of SMS (which comes with your own program). If the program is not allowed to send SMS, it cannot be sent. Need to be adjusted to allow.

If not, it can only be solved by brushing machine. In general, this problem is related to the permission setting, followed by the wrong number of the SMS center.