Network security key | Xfinity Community Forum
https://forums.xfinity.com/conversations/your-home-network/network-security-key/602dae7bc5375f08cdeb9a72
Mar 31, 2020 · Network security key. If it's a Comcast rental device, you can find it on a label on the back or bottom of the case where it might be called "Network Key" or "Password". Or at https://www.xfinity.com/support/articles/view-change-wifi-password. If it's a retail device you purchased, we'd need the model number.
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