Joke Collection Website - Blessing messages - Help ~ how to change the SMS ringtone of ~Iphone 4?

Help ~ how to change the SMS ringtone of ~Iphone 4?

Don't use 9 1 for ringtones. Find the song with the ringtone you want directly in itunes, right click-Display Introduction-Options-Adjust the start time and stop time (that is, the start time and stop time of your ringtone). Make sure it is within 40 seconds), then select the song again and right click to select Create ACC Version. At this time, a line will appear below the song. Select it, right-click it and display it in windows Explorer. Change m4a to m4r, play it, and it will be displayed in the ringtone!