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Your BLU Pro Studio sports a microSD memory card slot. If your laptop or personal computer has a slot for that card format (Most laptops are so-equipped), you should be able to transfer a music file
The BLU Studio Pro is an Android smartphone and the Android market offers a bunch of free ringtone apps such as MP3 Ringtone Maker, RingDroid (open source) and more.
Here are some of the free ringtones (compatible with your BLU Studio Pro) we offer:
Free Horror Ringtones Free Ghost Ringtones Free Ringtones-a-gogo Free Techno Ringtones Hear All Our Free Polyphonic Ringtones