In my humble opinion, as for as I know, you cannot update the firmware outside the service station or factory. Specialized jigs; procedures and skills are needed.
Even if you manage to enter the 'Service Mode' it cannot help to upload files especially firmware.
Answers & Comments
In my humble opinion, as for as I know, you cannot update the firmware outside the service station or factory. Specialized jigs; procedures and skills are needed.
Even if you manage to enter the 'Service Mode' it cannot help to upload files especially firmware.
How did you get the firmware at the first place.