How to set your favorite SMS ringtone on iPhone 4 without jailbreaking

People are asking about SMS ringtones, not phone ringtones. . . It seems that there is no other way to replace the ringtone except 91 and jailbreak. . It's better to go ahead, otherwise you can't install the input method and it will be very painful. First go to itunes preferences and then import settings to import and use the AIFF encoder

. Then add the music you want to the iTunes library file first - add the file to the library and then right-click on the music file in the music in the library - after creating the AIFF version, there will be an extra file. Click on the extra file. Right-click and display in Windows Explorer that the pop-up folder is your SMS ringtone. Then change the file and file extension to sms-received6.caf and then use ifunbox to find /System/Library/Audio/UISounds/ with sms- received file, drag out the file with the same name as a backup, then drag the file you created into it and it will be ok, then restart the phone