Hello,
Please be aware to disable the "Keep settings" option if you attempt to upgrade the firmware manually from a file.
If it is still not working, you may upgrade the firmware using the SSH software / CLI as shown below:
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Upload RUTXXX_R_00.0x.xxx_WEBUI.bin file to the router. You can do this with WinSCP software:
File protocol: SCP
Host name: 192.168.1.1 (router IP address)
User name: root
Password: admin01 (or new WebUi password)
Copy the file RUTXXX_R_00.0x.xxx_WEBUI.bin to /tmp directory.
Connect to RUT by SSH. User: root. Password: admin01 (or new WebUi password)
Under Linux:
ssh root@192.168.1.1
Under Windows:
Best use Putty software or something similar:
http://www.chiark.greenend.org.uk/~sgtatham/putty/
Enter these commands:
root@Teltonika:~# cd /tmp/
root@Teltonika:/tmp# sysupgrade -n RUTXXX_R_00.0x.xxx_WEBUI.bin
Wait about 10 minutes, while firmware will be upgraded.
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Best Regards,