upgrade MX4 from 5.1.1.1.0G not installing

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1

2018-03-17 18:04

Hi,

I have a Meizu MX4 that seems to be stuck on 5.1.1.1.0G
I have tried to upgrade from the onscreen prompt, from settings, and copying update.zip to the phone and running that. Neither method works as it fails on checking firmware - giving the warning "firmware corrupt".

Can anyone suggest how I can upgrade this device?