I am having Lumia 620,i am unable to turn on/off my wifi.In the settings menu it is showing as turned on for Wifi but when i click on the wifi option it shows as off.I am unable to turn it on and it not connecting it to any wifi available nearby and not searching any as well.
- Restart your phone.
- Check that Internet Sharing is off.
- Soft reset (Power key + Volume Down key for 15 seconds).
- Hard reset (Power Key + Volume Down Key + Camera Key) if necessary. A hard reset returns your phone "to the same state it was in the first time you turned it on". If you had backup enabled, you could restore some data after the reset, but you'll still lose other data.