User can use USB->TTL cable to connect PC with G806(4G LTE router) and then upgrade G806(4G LTE router) firmware by serial. This manual is to introduce whole process of upgrading G806 firmware by serial.
Step 1: Copy firmware version file .bin to tftpd32 file catalog and rename to test.bin.
Step 2: Configure PC with static IP address in same network segment with G806(4G LTE router) (192.168.1.X).
Step 3: Run tftpd32.exe and select correct path.
Step 4: Run Xshell and establish a new serial session.
Step 5: Click OK and connect the session. After connecting successfully, power off the G806 and power again the G806(4G LTE router) and do the follow steps:
Step 6: Upgrade firmware version and wait for G806(4G LTE router) resetting can upgrade successfully.