Why can't others see the Happy Birthday SMS of Apple's mobile phone?

Take iPhone 1 1 as an example. Under the iOS 14. 1 system, the Apple SMS special effect is sent to others, but he can't see it because he uses an Android phone or the version of his Apple phone system is too low.

Apple SMS special effects can only be seen by users of the same version of Apple system. Apple SMS special effects belong to the function of ios system, which is not recognized by Android system.

Apple SMS special effect is a function of ios 10. If the version of the other party's Apple mobile phone system is lower than ios 10, you will not see the SMS special effect. When the other party uses an Android mobile phone or a mobile phone with a version lower than ios 10, the user needs to send a traditional short message, that is, a short message without special effects to the other party.

Users can also inform each other to switch to Apple mobile phones to receive short messages, or upgrade the Apple mobile phone system to the latest version. You can't see the special effects of Apple SMS with the lower version of Apple mobile phone.