http://www.samsung.com.cn/Support/ProductSupport/download/index.aspx 本来就是免费的 http://www.samsung.com.cn/Support/ProductSupport/download/Model_Select.aspx?type=Mobile+Phone&typecode=18&subtype=Mobile+Phone&cmssubtypecode=1805&model=SGH-E808&filetype=SW&language=