Mobile phones always delay receiving short messages, and they will not see them until they are restarted. Is it the phone or the card?

Cell phone signal is not good. One possibility is that your signal is weak and you can't receive it. If you don't receive the text message, it will be delayed for several minutes to several hours. Another reason is that the signal of your mobile phone is not good, which means there is something wrong with the quality of your mobile phone. The suggestion is to change your mobile phone and roam as little as possible. The signal is not good when roaming, and it is often late, even by train.