Why does my mobile phone receive short messages slowly?

On the one hand, it may be because the signal is not good, even if the mobile phone displays full signal, it is sometimes empty ... On the other hand, if someone sends it to you by Fetion, it is normal, because the Fetion platform is often unstable ... Generally speaking, it is not the problem of the mobile phone and the card. I tried ... I'm going to change my cell phone. I also took the card to the service hall for testing ... Basically, all I can do is to call 10086 to refresh the data ... If you find this situation, it is more practical to call, and you will find that all delayed text messages will arrive together within one minute! Another way is to restart the phone, and all delayed messages will arrive immediately ... For this reason, I am serious about BS China Mobile! ! !