Your ZTE A520 Blade is equipped with a microSD memory card slot. If your laptop or personal computer is compatible with that kind of card (Most laptop computers are so-equipped), you should be able to transfer music files
The ZTE Blade A520 is an Android smartphone and the Android market offers a bunch of free ringtone apps such as MP3 Ringtone Maker, Myxer and more.
The ZTE Blade A520 is Bluetooth-equipped. Bluetooth is a wireless protocol which lets you connect your cell phone to other devices. If your computer is also Bluetooth-enabled, simply connect both devices and transfer your audio files from your computer to your ZTE Blade A520.
Learn more about making your own free ringtones
Here is a sample of the all free ringtones (compatible with your ZTE Blade A520) we offer:
Free 'Unclassified' Ringtones Free Ghost Ringtones Free Short Ringtones Free Techno Ringtones Hear All Our Free Polyphonic Ringtones