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Xfinity will allow you to bring both a modem and a router. AT&T will not because their gateway/router does authentication into their network. Some people on the
by wil421 5y ago
Xfinity will allow you to bring both a modem and a router. AT&T will not because their gateway/router does authentication into their network. Some people on the UniFi forums were able to pass authentication back to the gateway but it reduced speed.