Originally Posted by John Clark
Do you have wifi turned on? Are you connected to a wifi network?
I'll reiterate this as well - is the Wi-Fi logo grey or white? If it's grey it's not connected via Wi-Fi.
By default, the Vodafone Techie being right here, if there is a Wi-Fi connection then the phone will use that over a GPRS/3G connection...
To further aid this if you are using your wireless broadband at home for talking sake, you'll have to enter in the Pre-Shared Key and have it saved so that everytime you have Wi-Fi enabled and you are within range it will automatically log on via Wi-Fi
Hope this helps