Why can't Apple 5s receive the message?

You can check whether the mailbox is full first. If it is full, please delete some information.

If you still can't get it after deletion, you can change the machine or card to see if it is a hardware factor;

After eliminating the above reasons, you can try to test whether it can be received elsewhere to see if it is the reason for the weak local signal.

If none of the above problems exist, it may be related to the network function. Please contact the local manual customer service to handle this problem.

Your mobile phone may not be spent. You need to call customer service to check your phone bill balance. If you owe money, please pay it in time.

Or because the signal in your place is not good and you can't receive short messages, you need to go to a place with a signal to receive information.

Or because of your phone settings.

Or you have set up a blacklist and information interception, and you need to set it there to modify it.