On this page you will find the I Don't Know - Radio Mix ringtone in several versions, all free to download. Original song by Erika. There are 7 versions, from 15 to 44 seconds long. Tags: electronic, house and upbeat. Click a tag below to see more ringtones like this. Android users need the .MP3 file, iPhone users need the .M4R file. Both are free. All ringtones by Erika are collected on the artist page.