A Telstra spokesperson told CNet:
“Unfortunately, we’ve had to revise the coverage performance rating for the Defy. Recent testing has shown that, due to a manufacturing change, the Defy doesn’t meet our Blue Tick performance criteria. This applies to all Defy’s sold to date.”
It seems strange that the reason for the changed rating could be a “manufacturing change” when it applies to all phones sold since the launch in December last year, although given telcos spend months testing phones before launch, it is possible.
Telstra still think the phone’s reception is pretty good, but should you require Blue tick certification in your mobile, the company has set up an online form to be filled out here.