To set your personalized ringtone, go to your phone's settings, then to the "Ringtone" section. You will be able to choose your personalized ringtone from the available options.You can find classic phone ringtones on specialized websites, ringtone apps, or by searching online. Be sure to choose reliable sources for a varied choice.No, customizing ringtones generally does not affect the performance of your Android phone. Ringtones are lightweight audio files that should not influence performance.Yes, you can assign specific ringtones to each contact in your phonebook. This allows you to further personalize your phone experience.