How to install Y firmware from G Firmware?

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2017-03-07 16:39

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I want to install Flyme 6.7.1.17 beta and it's a Y firmware. My current firmware is Flyme 5.2.10.1G. I have downloaded for 4 times already the Y firmware, but it keeps saying "FIRMWARE CORRUPT."  I already checked the md5sum and it's similar in what is posted in the flyme.cn download site. Can you please help me with this?Thank you.