The latest official firmware for the OBi110 is 1.3.0-2886 and is still available in the same place where it has been for a long time.
https://www.obitalk.com/forum/index.php?topic=9.0Yes there have been reports that it is no longer possible to add or re-add OBi1x0 devices to a dashboard. However it is and always has been possible to make OBi to OBi calls even if not registered on the portal. (Recall the instruction leaflet saying to call the echo test number before adding to dashboard.)
Probably the most common reasons that manual configuration (for any ITSP) using the onboard web server interface fails are:
1. Not disabling Obitalk Provisioning which means that the entered settings, even if correct, are immediately overwritten by the incorrect ones on the portal when the OBi is rebooted.
2. Not appreciating that the SIP username and password are usually NOT the same as the username and password used to log in to the account on the ITSP's web site.