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  1. K

    how to upgrade from android 2.1 to 2.2 or 2.3

    hi everyone, recently i went to china and bought a android tablet with 2.1 os from non brand manufacturer . as i am new to android os, i dont know how to upgrade to 2.2 or 2.3. but i tried to update. by clicking system upgrade->check updating, but it is giving error "failed in checking for...