Why can't vivo mobile phone receive the short message sent by Apple mobile phone immesg?

Is it iMessage? Vivo mobile phone cannot receive iMessage message sent by Apple mobile phone. Only two mobile phones are Apple systems, and only when this function is turned on can they be used by opening the network. Other mobile phones can't connect, so you can only use SMS.

IMessage is an instant messaging software launched by Apple, which can send short messages, videos and so on. It has high security. IMessage is different from SMS/MMS service of operators. Users only need the data support of WiFi or 3G network to complete communication. IMessage uses the new message reminder system of iOS and Mac os to directly push information to the other party's screen, regardless of whether the other party is in the game or locked. If both parties are using iMessage, you can even see the state of each other's speech.