M5s with 5.2.13.1A cannot update

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2

2018-11-03 19:32

Hello Folks.
I bought my Meizu by internet straight from china, and I would like to update downloading from the official site the needed files. But I always get the same message "Firmware Corrupt". I tried to chechk "Clear data" radio button, also tried with several versions of the "update.zip" file. Does anybody knows how to upgrade this phone? Does anybody knows if it's possible to change form A version to G version?
Thanks in advance.