This is after-market/non-OEM version back cover backplate battery door for i Phone 4.
This backplate has apple logo - makes owner unhappy, since the color backplate from outside, maybe make i Phone 4 more trendy than single color, or feel better from white one in advance as white has not yet launch in market.
This pictues - left as titanium, and right as silver one. Change of backplate only release two screws at i phone bottom in one minute, and take original one-and put back and lock within few minutes again. Your one become new outlook.
The top left - Peach Pink and Purple. The top-right - white and pink. The bottom one - Titanium and silver.
The item has in box set, or in blister pack. Request personally by e-mail to: mobileworkshops@gmail.com for further discussion.