The text message can be received later, but is it possible that it will not be received?

It's possible! I have encountered (I didn't receive it, not for other reasons)' I may not receive the text message' and I may receive the text message from others' (others didn't send it wrong! Especially during the peak holiday season) I personally think it should be related to electromagnetic interference. You can consult Unicom or something. You press the complaint button and tell them that the message you sent to yourself has not been received for a long time. Why? They will explain it to you slowly.