a. Move closer to a Wi-Fi router to get a better signal.
b. If possible, try to create a connection with some other device that supports Wi-Fi (to see that the access point is really working).
c. If you are using a home Wi-Fi network:
- Unplug the power from your Wi-Fi router, then wait for 1 minute and plug your router back.
- In the router settings, remove the WLAN security temporarily, and try to create a WLAN connection from the phone without any security settings first. Refer to your router's user manual to find detailed instructions.
- If you keep getting an Incorrect password error, log in to your wireless router, and change the operating mode 802.11b/g/n to 802.11g only, and then restart/reset the router, and try to create a connection again.
- Disable other active network services such as video streaming and online games.
- Check on the router's support page that it has the latest firmware installed.
d. Restart your phone and check if you have resolved your issue. If not, continue troubleshooting with the steps below:
- Switch Battery saver mode off, or connect a charger to your phone (Settings > battery saver).
- Tap Settings > Bluetooth and switch the status temporarily to Off.
- Delete the non-functioning Wi-Fi network and connect it again: Go to Settings > WiFi > manage (advanced). Under Known networks, tap and hold on the network name and select Delete. Tap back and select the network from the list.
- Check if there is new software available for your phone: Tap Settings > phone update.
Note! If you are using a public Wi-Fi network, all IP addresses may be in use. Try connecting to a different Wi-Fi network.