…the recovered data included user SMS and voice call contents, user internet traffic, and cellular network signaling protocols… the team was able to collect unencrypted satellite data “from sea vessels owned by the US military,” along with traffic from multiple organizations within the Mexican government and military, including personnel records, narcotics activity, and military asset tracking…
I’m not sure its been many years since I’ve looked.
Wikipedia only mentions analog/digital terrestrial, IPTV and cable as of 2020. They cite a 2013 article with this info: “Imported TV sets that are able to operate on both PAL and NTSC, such as those from Japan, have their NTSC abilities disabled by the government on import.” I can’t imagine how they do it on flat screens (it was not really feasible to import a new CRT in 2013+) because LCDs/OLEDs do all scaling in a single chip. Presumably, they could shut down the system if they detect 59.94 Hz with an added circuit but that’s easy to find and remove.