The ring tone that been used by Eric Suen in the movie. I went look for it on Google but I couldn't find that ring tone. If anyone know the name of that ring tone, please let me know =)
try looking for the mobile model that eric uses, it possibly preloaded with teh phone model if you find the phone model (sounds like sony erricson) you can find it MAYBE on ringtone sites for sony ericcson or w.e brand/model
I know its a sony ericsson phone but don't know what series it is. edited I highly think the phone is W960i G900i or G700i because of the curvy shape which none of the sony phone seem to have with the button near the speaker. You can watch episode 8 23:55 to compare the phone. W960i