I'll explain why I keep harping on about the echo test.
When you dial **9 222 222 222 (or more generally, **9 followed by a 9 digit OBi number) the call uses the Obitalk network. The Obitalk network is in effect an extra Service Provider in addition to the four that can be configured on your OBi200. However it requires no configuration. All the parameters are "hard coded" into the firmware so it should be available on any booted up OBi device that has internet access. No other Service Provider needs to be configured. The OBi does not even need to be or have been registered to the portal. Like all other providers, the Obitalk service can be disabled but the default setting is "enabled". See screenshot "obtalk_enable". When enabled, the status should show as "Normal". See screenshot "obitalk_status". What does yours show? (You need to scroll down that page from your OBi.) I doubt it says "Normal".
So that echo test is a very first level test that the OBi has adequate internet connectivity. If it does not work, trying to get any of the service providers that do require configuration is not going to succeed.
So why is the Obitalk service not "Normal" for you? Logically there are only three possible reasons:
1. Your Obi200 is defective in some way.
2. Your Obi's connection to the internet is not working as needed.
3. The Obitalk Service server at the distant end is not working properly.
We can discount the third one, If it was not working properly for an extended period, lots of people would have noticed. I have verified it is working as I type this.
Given that things were OK until the recent firmware upgrade and you have not mentioned any changes to your internet access the most likely reason is the first one. I know you say you have reset your OBi several times but have you done a real reset to defaults? Dial ***8 and follow the prompts. However before doing that please post a screenshot like "system_status" below. Obliterate the same fields that I have. Leave ali the others visible - they present no security nor privacy risk. After the reset, it will revert to DHCP. Leave it on DHCP, take another screenshot, obliterate the same bits as before and post that one too.
And last but not least. Is there any way that you setup differs from the typical home installation of cable, xDSL or fibre modem and router?