As Bing is released by Microsoft ,Microsoft is giving Free Bing ring tones to your mobiles to promote Bing.You can download these ring tones freely form Microsoft Website.
These Bing ring tones are called as “BingTones” .These BingTones will be in MP3 format.Since ringtones are in MP3 format any windows mobile Phone will play these Ringtones .Check the instructions for other phones in the PDF manual provided along with ringtones.
don’t miss to read Bing articles below
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How To Save High Resolution Background Images on Bing to Desktop
How to make Bing as Default Search Engine In Firefox