1
This is the basic and most simple way to update the device.This way suits to X431 all family machines.Incl X431,Diagun Master Heavy Duty GX3 Tool and AutoBook etc.But you need to offer absolutely right serial number otherwise the update won't work.
2
Probably,this is the most thorny solution for X431 owners,as they need to send their units to us.But this solution's advantage is you will have new serial number that can keep the update up-to-date
3
Only spend less money for the smartbox board,you will get software update very up to date and for free.A new serial number for your device.
This way can upgrade your X431 to Master,see below