Firmware Problem

Hi i was truing this guide to change my firmware on My phone from A to I version.

After finishing all steps my phone restart and the stuck on logo screen, When i try to hard reset shows a message that firmware missing. When i try to connect with usb computeer show unknown device. Any suggestion how to solve this problem?

Meizu MX4 Pro

Hi, could you share what the solution was? I had the same issue, but I upgraded to the latest 5.5 in the end.

After I fail to intall the International version in my phone computer didnt recognize the phone and its shows Unknown Devide so i put the phone on recorery mode and the computer recognize it so i transfer the upgrade file and continue the root of phone.

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