Firstly, the correct grammar should be ARE there - tunes being plural.

Secondly, the answer is yes. Some phones can be adapted to use MP3s as ringtones.

I've got Captain Pugwash and the Tanqueray Martini shanty on mine, but please don't ask how it got there, someone sent it to me! All I know is that Bluetooth was involved and they had to copy it.

LTS