On a home router, the WEP/WPA/WPA2/WPA3 key is managed in the router’s own wireless settings, not in Windows.
To locate or change it for a TMOBILE‑CEF8 (or any similar home router):
- Connect a PC/phone to the router (Wi‑Fi or Ethernet).
- Open a web browser and go to the router’s admin page (commonly something like
192.168.0.1 or 192.168.1.1; check the label on the router for the exact address, username, and password).
- Sign in with the router’s admin username and password (often printed on the router label if not changed).
- In the router’s interface, open the Wireless/Wi‑Fi or WLAN settings page.
- Look for “Security,” “Wireless Security,” or similar. The current network name (SSID) and security type (WPA2/WPA3/WEP) will be shown there.
- The “Security Key,” “Password,” or “Network Key” field is the value needed. If it shows as dots, there is usually an option to reveal or change it.
If the goal is to connect a Windows 10/11 PC and the router supports it, configure the router to use WPA2 or WPA3 instead of WEP, as recommended in Windows wireless setup guidance. WEP is obsolete and much less secure.
If the router label includes a “Wi‑Fi password,” “Wireless key,” or similar, that printed value is the default key unless it has been changed in the admin page.
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