[PX3] MTCE Firmware [7.1.2]

[tanukumar771]

Hi,

I Need Some Help About Mtce Head Unit
I Have Px3 Mtce [7.1.2] 1024x600 It Has Stock Firmware I Want To Update It To Custom Rom But Before That I Want To Backup Stock Firmware

Please Can Anyone Tell Me How Can I Backup My Original Firmware

 

[tanukumar771]

???