Once upon a time, Nokia were the phone comany to beat. Everyone had at least one Nokia handset, and you probably still have a couple floating around your home.
And with a Nokia phone, came that Nokia ringtone. You can likely hear it rattling around your head right now and you certainly heard it hundreds of times during the earlier days of the mobile phone. Some version of these tones still exists on most modern Nokia handsets but the Finnish company wanted to do something special to mark 20 years since the song debuted on the 2110 phone in 1994.
Here's the original version!
And now here's an a capella version with four people giving their interpretation of the tune at the same time. Naturally while also being recorded on Nokia's current crop of smartphones.