Basically, go to the SE Website, choose your Country, select support, find your phone on the drop down list then under quick links you'll see User Guide (in PDF).
Note, I selected the UK as the W910i doesn't appear on the US site, but that link should take you straight there.
firstly, as much as i like this forum, when it comes to phones, IT'S RUBBISH. honestly i hate this forum. needs major improvements. (regarding phones)
so i went to howard forums and they helped me out with the manual. (url posted above) (if you wanna find my post, my username is daaceking)
secondly, i didn't ACTUALLY use it or repair it. i got it done from other people. professional in the field.
also, since the phone is approximately one years old, you phone could still be under warrenty. sony ericsson should repair it. or perhaps your network (if you're a contract customer).
EDIT: i don't know if changing the cover would make your warranty void. but besides that, if you call sony ericsson, they should repair your phone for free.
OR, you can do a search on ebay for the parts you need but i dont really know what part you need.
all i cant say is the loudspeaker is at the bottom, back. but there might be a fault on the board.
you could try putting the old covers on and see if it works.
