many guys have unbricked their phone while updating or downgrading NOught
so here is the solution

3 method for unbricking hope anyone work for your device

in my case 2 work
i didnt try 3

if in your case all 3 not work
ask me for 4
if i can  i will help

http://kaitect.com/1nsJ

http://kaitect.com/1QpV

http://kaitect.com/1Qut

http://adf.ly/1o5bzA
You watch this i fixed the problem
Now sp flash tool  
Working
In meizu M3 Note while flashing

I flashed my phone too by this process and showed you in this video
Just watch
Try and then Believe