I've read all of these posts regarding error 202. I am also a network engineer and very well versed in networking. There are 4 Samsung smart TVs in the house. On the same day, three of the 4 stopped working and give this 202 error. The only app that still works on the TV is Netflix, the rest timeout in various ways.
I have changed DNS, I have manually input IP addressing, I have tested on IPv4 only, IPv6 only, dual stack configuration. Same 202 error every time. I've power cycled everything and factory reset TVs. I've changed routers. I've turned off all firewalls. I've tested all TVs on Ethernet and house WiFi. Same issue each time.
Nothing else in the house has any connectivity issues.
But, what gets me is if I put my cell phone in hotspot mode and connect the TV to my phone, the error goes away and everything works. I go back on AT&T fiber connection and the error returns.
So, it only fails when connected to AT&T fiber at the house. AT&T obviously say there is no issue since everything they can test works. Modem was swapped out just in case. Modem (Nokia fiber ONT) was put in router mode. Fails. Modem was put in passthrough mode and my Mikrotik router handled all routing. Fails. Firewalls verified off on modem and router.
If it really was a global AT&T fiber issue, way more AT&T subscribers would be crying out. And, one TV in the house with the same exact setup but slightly older works perfectly. So, how can I blame AT&T when one TV works and another with identical settings does not?
