Originally Posted by Eonon

https://drive.google.com/file/d/0BwO...ew?usp=sharing

Instructions:
Firstly please write down the system information and all the data of the factory settings of your unit.
It is very important to record these data before upgrade.

1). Extract it and copy "update.img" to a blank SD card formatted as FAT32.
2). Power Off the head unit
3). Insert the SD card to the GPS SD SLOT (yes, it should be GPS slot)
4). Enter Settings----About machine，click System updates
5). The head unit detect the upgrade software, and then click confirm to upgrade it.(Click the "Wipe data and format flash!" icon)

Attention: Please do not power off and do not take out of SD card during update. It may take 5 minutes for update, so please pay more
patience on it. And please follow the way to update it strictly.