I'm four for four 
.   
I contacted Uavionix and installed a new (not yet released) version of the wifi firmware, pingWifi-1_3_4.bin.  10 minutes into flight I get the dreaded Networking Error dialg box.  Frustrating!   
I landed and attempted to configure my 740 with a static IP address using the following parameters
198.164.4.108 (static IP)
255.255.255.0 (mask)
0.0.0.0  (router)
198.164.4.1 (DNS)
I could not get the above to work either on the 740 or my iPhone.   
At home, sitting in your comfy chair, a networking error can be considered benign, albeit frustrating.   In flight, it's a safety issue.   Walter, what is iFly GPS's position on this issue?   Is iFLY GPS actively working with Uavionix on a solution?  If not, can you put it in the backlog?
I'll shortly have access to another 740, so I will be well positioned to help test or gather additional information.   LMK what I can to do help out.
It would be immensely helpful fi iFlyGPS could at least confirm a validate a static IP address configuration that can be used with the EchoUAT.    
Thanks in advance for sharing what actions iFLYGPS will be taking to address this problem.