Seems as though the ObiHai support team is so confidant that there is nothing wrong with attempting a F/W update via Wi-Fi that they stomped on my post about my fail. And I don't consider my Wi-Fi "lossy".... it ran solid without any issues until this came up.
When I attempted to update via Wi-Fi, everything seemed to go well until the end. Then I got the unsuccessful update warning and slow blinking green light. I was stuck.
No phone attached to my Obi202 would give any report of IP (***1) or provide f/w update (***6). After trying everything else, I then attached an ethernet cable and WALLA.... problem solved. My question was "how would the unit know its IP address without a LAN connection?" Once the f/w was changed during the update process, it did not appear that the Wi-Fi connection got the DHCP assignment from the router. To me, that meant that Wi-Fi does not handle this well.
So, if you want to tempt fate, go ahead and try updating via Wi-Fi.... but as for me, I learned my lesson. Just sayin'..........