If you have a music file on your PC/Mac, you can sync it manually.
Do you need a more for the GarageBand method, or skachat melodiiu dlia aifona
Change the file extension from .m4a to .m4r . If you have a music file on your
Save any MP3 file to your iPhone's "Files" app. Open GarageBand: Select the "Audio Recorder" tool. Open GarageBand: Select the "Audio Recorder" tool
Connect your iPhone to the computer and drag the .m4r file into the "Tones" or "General" section of your device in iTunes/Finder. How to Apply Your New Ringtone
Once you have downloaded or created the file, follow these steps to set it: Open . Go to Sounds & Haptics (or just "Sounds"). Tap Ringtone . Find your new melody at the top of the list and select it.
Tap the "Loops" icon (top right), select the "Files" tab, and drag your song onto the timeline.