Back cover replacing
About a month ago my N4 dropped down and broke the back cover glass, so I ordered this one
on ebay from a german store (I live in Italy) for a total amount of €.53,90.
It is ready to be assembled onto the phone and includes NFC antenna and (I think) the Bluetooth one.
Today it is been delivered and I've just replaced.
This is a very easy operation, only require a n 4 torx screwdriver and a plastic pad (a guitar pad is optimal).
With only those tools and a little care everyone can replace it.
First unscrew the two screws on the bottom, then carefully insert the plastic pad between the top chrome frame and the plastic one starting from the bottom of the phone having care of the usb port frame, it is very thin and easy to be broken.
Once disassembled pull away the protective plastic protective stickers from the camera glass and the usb port frame and place on the new cover, having care to pair the two parts with your fingers, put back on the two screws, that's it, all done.
Oh, and I higly recommend to protect your N4 with a bumper case or something else.