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I've installed Android 2.3 (Cyanogen Mod) to my LG GT540 phone, but it's too unstable. I would like to downgrade back to 2.1update (it's the OS I have when I buy the phone), or any official newer version. Where can I get official LG version, and how to install it? Thanks in advanced.

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Did you try the answer on this other question tagged "downgrade"?… – Al E. Sep 12 '11 at 3:24
Where can I find original rom? – DatVM Sep 12 '11 at 3:32

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