If you downloaded a ringtone from the Popz Place Downloads page, here is how to set it up on your iPhone.
.m4r format. The Popz Place ringtones are already provided in the correct format:
.zip file containing a .m4r file.m4r file download.zip file downloads. Tap it in Safari to extract — you will get a .m4r file. Tap Save to Files and choose a folder..m4r file downloads directly. Tap Save to Files..m4r file in the Files app. Tap and drag it into the timeline at the top..zip, extract to get the .m4r.m4r directly.m4r file into the Tones section (Finder) or On My Device > Tones (iTunes).