This should really say 'for AT&T Customers on the iPhone', since tethering on my razr worked faultlessly with my Powerbook G4. Luckily, the very fact of having

This should really say 'for AT&T Customers on the iPhone', since tethering on my razr worked faultlessly with my Powerbook G4. Luckily, the very fact of having an iPhone, with a decent browser and mail, apps, Bloomberg etc., renders the laptop largely superfluous for the situations where I used to depend on tethering.