A:Answeryes.
it is on the specs for the unit.
here is the link. look under connectivity.
https://www.bestbuy.com/site/lg-27-class-led-full-hd-smart-tv-monitor-with-webos/6506780.p?skuId=6506780&ref=212&loc=1&extStoreId=504&ref=212&loc=1&gclid=EAIaIQobChMIo4ei2vnx-QIVuDizAB05cQ7QEAQYAiABEgL06PD_BwE&gclsrc=aw.ds
A:AnswerI haven't tried enabling this but there is a SimpLink option. This is in the All Settings > General > Devices > HDMI Settings menu. The default setting is Off.
A:AnswerYes you can download Discovery but I am not sure about Hallmark using wifi services, most or all smart tv's have wifi capabilities. I suggest searching for the Hallmark channel app due to that I do not watch Hallmark
A:AnswerTwenty and 3/8 inch.
The TV has a beautiful picture with wide viewing angle thanks to its IPS panel. We bought it for our basement exercise room and the built-in WiFi connects seamlessly with our WiFi router that is two floors above it.