Q: after update to ios6.1.3, wifi unable to yurn on. how to solve it, please help!!

Hello there cyldevil,

I would recommend using this article if the Wifi is grayed out in settings.

iOS: Wi-Fi settings grayed out or dim

http://support.apple.com/kb/ts1559

Here is also some additional info on troubleshooting wifi in general on your device from iOS: Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/ts1398

1. Be sure that you are in range of your Wi-Fi router (access point).
2. Tap Settings > Wi-Fi and turn Wi-Fi off and then on again.
   • If unable to do so, see this article.
3. Confirm that your Wi-Fi router and Cable or DSL modem are connected to power, turned on, and indicate that they are connected to the Internet.
   • If not, refer to your network administrator or ISP for assistance.
4. Restart your iOS device.
5. Tap Settings > Wi-Fi and locate the Wi-Fi network to which you are connected. Then tap > and Forget this Network. Try to connect to your desired Wi-Fi network again.
   • Note: You will need to enter your Wi-Fi password again if your desired network requires one.
6. Turn your Wi-Fi router off and then on again². If your ISP also provides cable or phone service, check with them before attempting this step to avoid interruption of service.
7. Update your device to the latest version of software.
8. Update your Wi-Fi router to the latest firmware².
   • For AirPort Base Stations, see this article for information about firmware updates.

All the best,

Sterling

Wonderful!

Thank you for the followup