Select an option from Settings > Sounds & Haptics > Ringtone to set a new default ringtone. You can use a third-party app to create a custom ringtone. Select it as the default in the Ringtone settings ...

The upcoming iOS 18.2 release will allow users to change their default calling and messaging apps on their iPhones. In other words, you will no longer need to use Apple’s native apps if you don’t want ...

Here's how to change your iPhone's default notification tone.