Joke Collection Website - Public benefit messages - We all use Apple 4 mobile phones. Why can't he receive my message when he closes the internet?

We all use Apple 4 mobile phones. Why can't he receive my message when he closes the internet?

What are you transmitting through?

If it is through the phone number, it means that it is a problem of the mobile operator (or it may be a mobile phone problem. ), you can call the mobile operator (Mobile 10086 Unicom 100 10? Telecom 10000).

If it is via imessage (that is, the recipient of the message is the other party's icloud account), this message can only be sent and received if your device has Internet, because it is transmitted through Apple's server. (This is actually similar to qq and WeChat. You need Internet and qq (Apple Device) on both sides. )