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@msubbu: If by 1st gen you do mean the K1, with the ugly design and LCD ruler, then, uh, no, there isn't, because it doesn't need one. The update system doesn't expect/requires signed packages/files. (That may have changed in v1.2, but I'm not sure, the first device I had was a K2i, so I have no real experience with the K1).
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