Why does my mobile phone receive short messages slowly?

First ask if there is such a situation in the same segment card. First, rule out whether it is a network problem, because network operators sometimes adjust the network at the beginning or end of the month, which will affect your use. If not, it's easy. Take down the memory card first, and then send it. If it is a normal card problem, repair the memory card or format it. Before formatting, keep important personal information of phone book messages in your phone. If the above can't be done, find a place where you can repair your mobile phone and rewrite the portable software, and it will be ok.