I have a Sprint Samsung phone.  One of the ring tones, which came with
the phone, is called "Sunnyday".  It's awesome.  I love it.  But alas,
I need to get a new phone.  I cannot go on without this ring tone.  I
can't find the song anywhere!  Is there a place where I can find out
information about the ring tones that came with my phone?

Or do you know who might have written the song?  Can I download that
ring tone online?  If so, where?

If you can find a link for me to listen to and download my song as a
ring, I'd be forever grateful.

P.S. It's not the Sesame Street theme song, it's not the Christian
Rock song by Jars of Clay, and it's not the song by Deana Carter.

What is the model number of your handset?

It's a Samsung A-500