Upgrade Firmware Meizu M3s

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2017-01-14 04:21

I just got my Meizu M3s (from US stock), and I noticed that the firmware is a few versions old.
I currently have 5.1.5.2A  but want to see if I can install 5.1.12.0G.
I have downloaded the firmware file from the official flymeos site and transferred to my phone, but it does not recognize it, perhaps because one is the CN/US version and the new one is the Global version.

Can someone help me on upgrading? Is it adviseable to upgrade from A to G? If not, can I get the latest A version somewhere?
What are the steps for upgrading? Will I lose all my data/se