Classic ringtones are often instantly recognizable. As soon as you hear them, you know a call is in progress.On the Internet, many sites offer free classic phone ringtones to download. Make sure you choose a trusted site to avoid any security issues.Some smartphones already offer classic ringtones in their settings. Browse the ringtone options to see if they are included.After downloading a classic ringtone, go to your phone's ringtone settings and select it as the default ringtone for incoming calls. You can also customize notification sounds.