Why did the prompts change after I changed the SMS ringtone on iphone6?

1 and the ringtone of iPhone6 have changed. If it is synchronized to the ringtone of the mobile phone, it is very likely that the synchronization function has been used recently and the ringtone of the mobile phone has been erased synchronously.

2. When using the synchronization function, the mobile phone must pay attention to the option setting during synchronization. When syncing songs or videos to your mobile phone, you should also click to enter the ringtone to see if the synchronization function is also checked.

3. When synchronizing other files, if the option in the ringtone is also checked, and the ringtone is not loaded in the soft armor ringtone synchronized by the computer, it will be erased by the system during synchronization.