Just upload your MP3 file to Zamzar's website, click to convert it, and then download a converted M4R ringtone file. Alternatively, you can do this using your ...
On your iPhone, tap the Settings app. Scroll down to Sounds and tap it. In the Sounds screen, scroll down to Ringtone and tap it. Scroll up to the top ...
Now, on your iPhone, go to Settings > Sounds & Haptics, tap on Ringtone and then choose your custom ringtone. All your custom ringtones will appear at the top ...