One of the big changes in 2019 was free wifi. Was that a one-off, or will there be free wifi again this year too?
I remember it working very well, and can find a number of Facebook posts confirming that it was reliable.
IIRC, the WiFi was provided by the ICC and not Gen Con directly. I just used my phone signal which worked fine throughout Gen Con, at least, the few places I actually checked it. The ICC website still lists WiFi as available in all public areas at a bandwidth that will accommodate checking email or web browsing, but not much more.
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The information I have says the WIFI will be free again this year, which is helpful since we are trying the E-Ticket with our group for a couple events.