It may be that dynamic DNS is implemented on the device level so that whenever the ZTE IP address changes each device pushes an update to the cloud server so that when you try to connect the IP address is known. I was thinking the same thing. I wish...
ZTE for remote monitoring, WAN IP is different that the 'What is my IP':
I have set up a ZTE MF275R for remote access monitoring at my RV.
The ZTE is up and running off the 12V batteries. I cut off the 12V DC 1.5 Amp adapter and connected it to the...