I have a Verizon-branded LTE extender -- I think it was made by "Askey", not the Samsung model. The device is online and supporting mobile access (in Closed mode, believe it or not) with no problem. But the admin web interface is not accessible at all. It's not a username/password issue -- there is no response at either 80/tcp (http) or 443/tcp (https).
This had worked when I installed the unit last year (replacing an earlier unit that "failed" because Verizon couldn't figure out how to allow configuration in Closed mode & couldn't figure out how to reset it within the account, either).
Is this a known problem?