Hello, this is actually the WIFI management function that comes with the mobile phone. You can find WLAN in the system settings of your mobile phone. After clicking enter, you can see all the WIFI signals scanned by the current mobile phone.
You can check whether there is any WIFI you have connected before in WLAN. Under normal circumstances, it should be stored at least, and the signal is weak at most. If the signal is particularly weak, or far away, and the mobile phone can't search, it will also show that it is out of range. Of course, you can refresh by clicking the refresh button, which is usually provided in WLAN. If it can't be refreshed, it means that the original WIFI signal may have changed, such as renaming or simply canceling it.
Moreover, mobile phones have another feature. Under normal circumstances, if it finds a signal difficult to connect or drop, it will automatically try to connect to another connection with strong signal. If you pass through the unencrypted WIFI signal area, but the signal phone is connected, it will be automatically saved in the list. You can choose to cancel saving this connection after you leave. Only when you arrive at that place again will it be automatically saved.
If you are in a fixed area, such as an office, I suggest you ask the network administrator whether the name of the router SSID has changed, or whether it has been hidden (this is a measure to prevent surfing the Internet), whether it needs to be added manually, or whether the password has changed.
At home, it is recommended that you log in to the router management interface manually to check whether the SSID is hidden or whether the password has been modified. If so, please quickly change the username and password of the router administrator. If you can't log in with the old administrator user name and password, you need to reset the router.
The housekeeper is responsible for detecting the WIFI signal connected to the mobile phone to see if it is safe. After all, many free WIFI signals actually have hidden traps.
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