1. Open iTunes and click "Music" on the left. 2. Choose a name from the music list on the right to make a ringtone, such as MP3. 3. Right-click the name, select "Show Introduction" and select "Options" in the pop-up window. 4. Set the start time and stop time in the options tab (within 40 seconds, because ringtones cannot exceed this time), and intercept one of them as ringtones according to your own preferences. 5. Confirm to exit the window and return to the MP3 name just now. Right-click the name and select Create AAC Version (V). 6. At this time, a music name with the same name was added at the bottom of the file just now, and the duration was just set. 7. Right-click the newly created song, select "Display in windows Explorer", change the format of "m4a" to "m4r", and select "Yes" in the pop-up window, so that the ringtone is ready. 8. Open "iphone" in "Devices", select "Ringtones", check "Synchronize Ringtones", select "All Ringtones" or "Select Ringtones", and then select "Synchronization" in the main interface to synchronize your ringtones to the iPhone.