Ringtones for mobile are downloadable in mp3 and m4r formats at https://toqueparacelular.com/. You can choose from a wide range of genres, including Hip Hop ringtones, Country ringtones, R&B ringtones, and even funny ringtones. Download them to your computer and sync them with your mobile phone.
Another easy way to create your own mobile ringtone is with iTunes or a Windows Phone Connector for Mac. All you need to do is connect your phone to your Mac and sync it. Then, unplug your phone and the ringtone you have created will be on your phone. Besides, there are also apps that will allow you to edit ringtones on iPhones. One such application is Fried Cookie's Ringtone Maker.