Why can't I get a text message on my mobile phone? I only get it every time I turn it on.

Signal problem, let's just say that if you are in a place where there is no signal and someone sends you a message, of course you can't receive it at this time, but when you come out to a place where there is a signal, this message can be received. This is because China Mobile, China Unicom or China Telecom temporarily store the information on their servers, and only after the signals sent by your mobile phone are detected regularly will the information be re-sent to your mobile phone. The storage time of this information on the server is limited.