Go to Settings > Sound > Phone Ringtone/Notification and select your new sound.

Move the sound files into the corresponding folders in your device's internal storage: /sdcard/media/audio/ringtones /sdcard/media/audio/notifications /sdcard/media/audio/alarms

You can listen to and download the full collection of notification ringtones from CyanogenMod 7 (Android 2.3.5). Iconic Sounds to Look For: CyanTone: The signature ringtone. Krypton: A popular notification sound. Pegasus: A classic alarm sound. Drip / Plastic Pipe: Classic short notification sounds. 🛠 How to Install Custom Sounds on Android

Works best on older Android versions or devices with CyanogenMod/LineageOS installed. 💡 Why These Sounds?