ok i just bought the sony ericsson w810i and i have the mp3 file for this song i really like and i was wondering wat do i have to do to make the phone play the song as my ringtone
I don't have that phone, but on my motorola krzr all I have to do is go to "options" after selecting the song and going to "apply as." When I select apply as, it gives me the option to apply as a ringtone.
Unfortunately I can't help any further than that since I don't have the phone, but just play around and see if you can find an option like that.
Luckily for you I have this phone. Go to Menu > My Stuff > Sounds > Your File. Click on the More button and select Use As > Ringtone. You can also make your own themes for this phone.