Apparently in the US people can’t currently use their iPhone as a modem — this is called tethering — while amazingly enough, we can here in New Zealand. Version 3.0 of the iPhone software has made it possible.
Luckily for us The Unofficial Apple Weblog have explained how to connect the Mac and the iPhone in their article Inside iPhone 3.0: Tethering:
Tethering works over both USB and Bluetooth. Using USB to tether simply requires enabling internet tethering in the iPhone’s settings, then plugging the iPhone into an available USB port on your computer. The Mac will automatically recognize the tethered iPhone, and your connection will be up and running.
Bluetooth tethering obviously requires enabling Bluetooth on both your iPhone and computer, and then selecting “Connect to Network” from the Bluetooth drop-down menu. Once again, the rest of the setup is automatic — it really doesn’t get much simpler than this.
[Via: Inside iPhone 3.0: Tethering.]
I followed the Bluetooth instructions and in a matter of moments, after switching off wireless on my MacBook Pro, was happily tweeting, gathering email and surfing the web, using the iPhone as a modem.
Of course, I turned it off again straight away. My cellphone plan includes 250 Mb per month, so I don’t want to blow through it accidentally downloading photos or watching YouTube movies.
I am confident though that I could now use it while out and about if I needed to.