I just brought a sony ericsson w880i off trademe, it only came with the charger and phone no USB cord, and it keeps saying 'insert correct sim card', ergh! So I found out it needs to be unlocked, I don't want to have to pay $90 to get it done, is there ANYway I can do this without a USB cord? May be a silly question but I'm not so great with phones! Any help would be greatly appreciated.