I did below steps, then dial *27 . Which does not work either.
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Manual Update Instructions:
1. Download the above linked file to your computer.
2. Access the web page of the OBi device (OBi via Internet/WAN Port):
From a phone attached to the PHONE port of the OBi dial * * * 1
The IP address of the OBi will be read to you
Open a new browser window on your PC and enter the IP address of the OBi.
E.g. 192.168.1.110
When prompted, enter "admin" for username and "admin" for password.
If you have previously changed the password, use that instead of "admin."
OBi202/OBi302 Note: To access the OBi via the LAN port, by default the LAN port IP (Gateway) address is: 192.168.10.1
OBi202/OBi302 Note: To access the integral web page via the WAN port, you may need to enable WAN access. To do this, from the connected phone dial ***0. Next, enter 30# - Press 1 to enter a new value - Press 1# to enable - Press 1 to save.
3. Now that you have accessed the OBi web page, go to the "System Management" - "Device Update" page. From there, "Browse" to the firmware file you just downloaded above and click Update.
4. Wait for the OBi to restart (approx. 30-60 seconds) and you will be good to go.