How to Set a Custom Ringtone The process of setting a custom ringtone may vary depending on your smartphone's operating system. Here's a general guide: For Android: Go to "Settings." Scroll to "Sound" or "Sounds & Vibration." Choose "Phone Ringtone" or "Ringtone." Select your desired ringtone from the list. For iOS (iPhone): Open the "Settings" app. Scroll down and tap "Sounds & Haptics." Under the "Sounds and Vibration Patterns" section, tap "Ringtone." Choose your custom ringtone from the list.