Need help?Do you have a question about the Comcast DPC3939B and is the answer not in the manual?
Locate and write down the default Network Name (SSID) and Network Key (Password) for your wireless gateway.
Connect your WiFi devices to the 2.4 GHz and optionally 5 GHz network using the default credentials.
Log in to the public 'xfinitywifi' network using your Comcast Business Internet credentials for guest access.
Access the gateway's admin tool via a web browser and change the default password for enhanced security.
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