How to set MP3 as ringtone on Sony Ericsson Xperia X10?
I find many Sony Ericsson Xperia X10 user have problems in doing this, so I did my best, and finally find the solution, to my surprise, it is actually very simple, just a small trick you have to know. Ok, start learning the trick below.-sony ericsson Android phones Problem and Solution-How to set MP3 as ringtone on Sony Ericsson Xperia X10: Copy the MP3 files from your “music” folder to the “ringtone” folder, if you can’t find the “ringtone” folder, you can create one yourself, than go to contacts, choose one contact and tap “edit” > “ringtone”, you can find the MP3 you just added there.