Apple has updated it’s knowledge database to help those “Unable to use Wi-Fi and Bluetooth”. This has been a known issue with the OS 3.0 and many blamed jailbreaking for it but that doesn’t seem to be the case, especially now that Apple has posted solution itself, given it never supports jailbreak community . . .
If you have the below symptoms, Apple has a solution for you!
Symptoms
- The device shows no Wi-Fi address or Bluetooth address (Tap Settings > General > About and scroll down toWi-Fi Address or Bluetooth).
- iPhone or iPod touch appears to be connected to a Wi-Fi network but cannot use Wi-Fi for checking email, surfing the Internet, or other data transactions.
- iPhone or iPod touch showing Wi-Fi or Bluetooth icon on device as grayed out.
- iPhone not able to pair with Bluetooth device or accessory.
- When you tap Settings > Wi-Fi and then tap
next to the network, no values or entries for IP Address, Subnet Mask, Router, or DNS appear.
The solution is as simple as below (especially the 4th one 
)
- Settings –> General –> Reset -> Reset Network Settings
- Settings –> General –> Reset –> Erase All Content and Settings
- Restore the device via iTunes
- Take your iPhone or iPod touch to Apple
iPhone / iPod touch downloads
{ 1 comment… read it below or add one }
This is rubbish.
Did this ages ago and it does not fix the WiFi issue.
Back to the drawing board Apple.