We have an old 4G modem from Verizon that has been unsupported and EOL for years. We are finally getting around to replacing it and I pulled the sim card out and put it into a new Netgear LM1200 modem. It powered on and found a the network but only cached DNS sites would work.
I tried bypassing the router and was given an ipv6 address on my laptop along with 3 ipv6 DNS addresses. Even here I was only able to access Google, Bing and Wikipedia. Trying to connect to IMDB gave a DNS probe error.
I put the SIM back into the old modem and was still getting the same issue. Am I missing something? It seems to be related to DNS but I’m not sure what to check next or if 4G or Verizon have special settings or rules for their network.