Oppo
Add a Wi-Fi Network Manually auf Oppo
A Wi-Fi network stops showing up in the scan list mainly for two reasons: the router owner disabled SSID broadcast, or the signal is too weak for the phone to register it reliably. Coloros then has no entry to tap, so the normal connect flow is not available.
Adding the network by hand works around this. You enter the SSID and password yourself instead of picking a name from a list, so the phone does not need to detect the broadcast at all.
To do this, go to Settings ➔ Wi-Fi ➔ Manually add a network ➔ Enter the SSID & Password and tap Confirm.
The SSID must match the router name exactly, including capitalization and spacing. A typo here is the most common reason the manual entry fails silently.
If the network is visible but just refuses to connect, adding it manually will not help. In that case the issue sits with authentication or the router itself, and checking the router's Wi-Fi settings or restarting it is the faster fix.