How to replace the iphone 4 back cover

My previous iPhone was stolen at the gym, low on funds I decided to buy the cheapest iPhone I could find that worked regardless of condition. I found an iphone 4 that had being completely abused and the iphone 4 back cover is cratched. I ended up buying the phone for a really low price and the back cover is really in a bad looks. In order to make my new phone in a good looks, I have to replace the the cratched back.
My first attempt at restoring it was a mild success, since I used mild sandpapers/rushed. But you can see that even with 800 grit sandpaper and about an hour I got it looking better, but it still had tons of deep dents and scratches.
So I have to buy a new Accessoires iphone 4 back cover. I search a lot of information about the iphone 4 back cover and read the reviews of it. Compared the price of it and the reputation of the website, I finally bought my new black iphone 4 back cover at TOPONS at $50.
Then, replace the back cover by myself.
Step 1: Decide and Drysand with first grit.
Dry sand with the least aggressive sandpaper needed to remove scratches. If you have deep scratches you may have to go down to 320-800, but if you have light scratches, 1000 or 1500 might be enough. The best way to test this is to run your fingernail around your phone and try to find a deep scratch. Start at a high grit ( 1500) and see if that removes the scracthes. If you still see deep scratches, try the next most aggressive grit, etc. For me I had to go all the way down to 320 grit, due to several 2-3mm deep defects. This first step is really time intensive, but make sure you don't use water, on the first step because it tends to hide scratches.
Step 2: Wetsand with remaining grits.
1)Use very little water when you wetsand ( don't want to kill you iPhone).
2)Make sure the previous sanding marks are completely gone before moving on to the next higher grit The 2nd point is important, and the reason many people get poor results when wetsanding. It's a simple technique but it takes practice/patience to get right.
Step 3: Cover openings.
Before you start polishing make sure you cover up your headphone port, volume buttons, vibrate button and 30 pin dock with sticky tack (that blue stuff). You can cover the camera glass, but the polishing compounds are not abrasiveness enough to scratch it (unlike the sandpaper). Sticky tack is easy to apply, and come off in one piece. Tape will probably work too but I found that the tape kept lifting off when I was buffing. Refer to the #2 in the following picture (the gray stuff).
Step 4: Polish.
Only two steps here, bringing back the shine, and then removing polishing.
Ah! It is as the one stean and the back cover is Original iPhone 4 Back Cover.

By Etout

www.electroniquestout.com