There are numerous apps available on both Android and iOS platforms that offer a wide selection of free and unique ringtones. Apps like Zedge, Audiko, and Myxer are popular choices. Simply install the app, browse through the categories, and download your favorite tones.
Many websites specialize in providing free ringtones for mobile devices. Websites like Mobile9, Mob.org, and FreeRingtone-Site.com have extensive collections across various genres. You can download ringtones directly to your phone or computer.