Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Require server password

Item requires a phone provider server password even if server does not, therefore won't function. Can't work around the server password requirement, according to D-Link customer service. Because my rural phone provider, TDS Telecom, omits the need for a server password, this DSL router-modem is unusable, and not only that, can't be returned, because the box was opened and the item was used.