Originally Posted by matt1313
Do you have a tutorial on this? I need to do it...
No, but I think iFixit has a teardown. You also might want to do a search on YouTube.
The back is held on via clips around the perimeter, and an adhesive pad inside. You'll need a small plastic pry tool to release the clips. You should heat the back after the clips are released to soften the adhesive to make it easier to separate the back.
The adhesive is bonded to the NFC antenna. Be careful you do not tug so hard on the antenna that you tear its ribbon near its connector. If you do (I did), you can get a new one from China for under 10 dollars.
There is a ribbon cable from the flash on the back to a zif connector on the front, which is easily removed and reconnected.
The toughest part of this is getting the first few clips released, and then just be patient and methodical on the adhesive. The adhesive is plenty sticky enough to be reused.
I did this twice on my phone as I didn't notice I tore the NFC cable the first time around. TEST NFC before reattaching the new back!