From a BBC link
Here
"Quote .....
Apple has released official advice for iPhone 4 owners to overcome the problem of the device losing signal when held by the lower left corner.
Steve Jobs responded to a query about the problem from one owner by saying: "
Just avoid holding it in that way."
The official advice is to "avoid gripping it in the lower left corner in a way that covers both sides of the black strip in the metal band".
Alternatively, said Apple,
customers could buy a case to shield the antenna. ......"
All I can say is
