Solve Wi-Fi problem on iOS 6

Solution 1: You may be the simplest way and resolve to fix a Wi-Fi connection is to turn off the 

WiFi settings are applied, and then run it, and you can also work'' to restart the device'' and then connect with Wi-Fi.

Solution 2: It is by renewing the IP address, through the following steps:

Jump to apply the settings and then Wi-Fi

Click on a Wi-Fi network to which they relate

Scroll down and click on the Renew Lease

Solution 3: by forgetting'' Wi-Fi network you follow these steps will delete passwords for Wi-Fi networks'':

Go to the application settings and Wi-Fi

Click on the Wi-Fi network to which they relate

Click on the option Forget This Network

Will come to you a confirmation message, click on Forget

Now go back to the Wi-Fi networks and try to connect to a network

Solution 4: through reset the network settings, and this option will remove all the settings saved for Wi-Fi networks and cellular network and the VPN and passwords for Wi-Fi:

Filled application settings, and then

Click on the Reset

Then reset all networks

The device will restart, now try to connect again to a Wi-Fi network

Solution 5: by changing the Wi-Fi connection in the router from WEP to WEP2 Personal