Before you begin, make sure of these points:

Other devices in your home should also be connectedwith your network. If they can't connect, you may need to contact your Internet service provider for additional help.

< >Check Airplane Mode . To check, swipe down from the top of the screen and tap Wireless. If Airplane Mode is on, tap Off to enable wireless connectivity.Wi-Fi password. If you've forgotten or don't know your Wi-Fi password, you may need to refer to your Internet service provider.Update Yourdevice  on the latest software version. You can install the latest software version wirelessly if you're able to connect to a more stable network, or download and transfer the software update to your device via USB. Next Steps:

< >Restart your Wi-Fi connection on your Kindle device. Swipe down from the top of the screen and tap Wireless, and then tap Wi-Fi. Next to Wi-Fi, tap Off, then tap On. 

< >Restart your Kindle device. Press and hold the Power button for 40 seconds or until the device restarts automatically. If your device restarts automatically before 40 seconds has passed, release the Power button. If your device does not automatically restart after 40 seconds, press the Power button until it turn on.

Move closer to your router. From your device, check if you can connect to your Wi-Fi network. If your network doesn't appear in the list, then, tap Scan from the Wi-Fi menu. If you still don't see your preferred network, you can add it manually to your device.  

< >Use Channel 1-11. Check that your wireless router is set to use a Wi-Fi channel from 1 to 11. For this please refer to your Internet service provider, if they provided your wireless router, or the router manufacturer, for additional help. 

< >Restart your router and modem. Unplug your modem and router, wait a full 30 seconds, and then plug the modem in. After your modem turns on, plug in your router and wait for it to turn on. 

If you still find some issues, refer to your Internet service provider for additional help or contact kindle customer service for kindle troubleshooting.