Not going to lie but I find that pretty ugly. Why would someone want to pay 25$ to have there countries flag on the battery cover? It would look better if the full back cover was a flag.
Go to Custom Covers & Cases for Your Phone, iPhone, BlackBerry, iPod & more from Coveroo to see a ton more options for customizing the battery door. I was just playing around on the site and selected that as a preview. I did want to customize my battery door on my 9700 or 9000 but I am giving it more serious thought for my Torch.
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