How to fix the WiFi radio?

I have faced the problem many times and what all I did is to restart my cell phone or reset it. Resetting let you lose all your data but once you will reset the cell the wi fi radio problem will get resolved. Or you can also try the battery pull as your first step.

You will not lose any data as well when you will pull the battery out. I will suggest you to pull out the battery while the phone is on. Then replace after a minute and let the phone reboot for 1 to 3 min. then see if the problem is fixed.

The chances are many that now you will not face the same problem, but if you still faces the problem just consult the service provider for customers support.