Samsung Galaxy S4: WiFi not scanning for networks:
Hello:
Try these troubleshooting tips:
1. If this is happening at home, it could be your network setup is having issues, turn off your router/modem, wait 2 minutes, and then turn the router back on.. wait for the router to connect and then try again..
OR
2. Go to:
Settings > WiFi > (remove your network & then re-add it, don't forget you need your WiFi password in order to log back in)
OR
3. Go to:
Settings > Connections (Network Connections) > More Networks > turn on Airplane Mode > wait a few seconds and then turn off Airplane Mode
OR
4. Go to:
Settings > My Device > Turn Power Saving Mode Off
.
SOURCE: I can't connect to my wi-fi settings
Activate and connect to a WLAN
1.In range of WLAN network, access an application or menu that needs a wireless connection.
2.On the Home screen, press <Start> → <More> → Settings → Connections → More... → Wi-Fi.
3.Press <Menu> → Turn On Wi-Fi.
The device will display available WLAN connections.
4.Select a network profile from the list.
The device will attempt to connect to the WLAN.
5.Select a network type and press <Next>.
6.Enter a pre-shared key for WLAN and press <Next> or <Finish>.
7.Set the IEEE 802.1x access option and the extensible authentication protocol (EAP) type and press <Finish> (if necessary).
Create a new WLAN
1.On the Home screen, press <Start> → <More> → Settings → Connections → More... → Wi-Fi.
2.Select New...
3.Enter a network name, configure connection settings, and press <Next>.
4.Enter network authentication settings and press <Next>.
5.Set the IEEE 802.1x access option and the extensible authentication protocol (EAP) type (if necessary).
6.When you are finished, press <Finish>.
SOURCE: Unable to Connect to WI-FI with my Samsung Galaxy
I just had this same problem - I suspect it may have been a new app I installed that changed some settings.
I fixed mine by going into Settings>Mobile Network settings, then tick "Use packet data". Worth a try.
SOURCE: wi-fi pasword connot conect to wi-fi
Network security key
Some later model wireless routers have the Password (ie.Encryption key) and the SSID already configured in the wireless router and this information is printed on a label on the bottom of the router.
These settings can be used to configure the wireless card and wireless adapters in your computer/laptop.
If these settings do not suit you, then it can be changed to suit your requirements.
The encryption key secures your data and wireless connection from unauthorized access.To configure the wireless settings in the router, connect a LAN cable from your computer to the wireless router, then open a Browser on your computer and enter the router's configuration IP address, then enter the admin login and password and then go to the wireless settings and configure the SSID and Encryption key.
The router's encryption key can be a Passphrase or the WEP or WPA or WPA2 key.If you use the Passphrase method select either WEP or WPA or WPA2 to generate the encryption key. You can enter the WEP or WPA or WPA2 key with 8 to 63 ASCII characters or 64 Hex digits.
Most people use Passphrase which is easier to remember eg. I was born in January 1988.
The strongest and latest security is WPA2, the weakest and oldest is WEP. To connect to your wireless router from the computer/laptop, configure the wireless card in your computer/laptop with the router's wireless settings ie SSID, plus the WPA or WPA2 encryption key. Then computer/laptops can communicate with your wireless router. http://www.fixya.com/support/r10267861-network_security_key
SOURCE: wi fi connection
maybe there is a password in your wifi,
or maybe you are connected automatically to thry this "settings" on wireless and networks click wi-fi and chose your network ^^,
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