At last - an easy method to tether any iPhone or Android without jailbreaking or rooting. Saw the news on Mac Rumors this morning and thought I'd give it a whirl.
The method I'm going to cover is for the iPhone and Mac but you can also do it for an Android/PC combination too. This does not require jailbreaking because it uses some groovy stuff in HTML5. First off - get along to Tether.com and register an account - it says that the service costs 30 USD per year but when I got to Paypal to pay, I was pleasantly surprised to see that it only cost 15 USD for the first year.
Once you have an account just download the Tether app to your Mac/PC and install. Run the app and just enter an SSID and password.
An ad-hoc connection will be created automatically for the Mac - just hit "create."
An ad-hoc icon will appear in the Mac's bar at the top.
Then just connect to the ad-hoc network on the iPhone.
Browse to http://tether.com/web from Safari and enter your user/pass. You will see some funky HTML5 magic going on and it will connect to the ad-hoc connection.
Once connected, Your browser will automatically fire up tether.com to let you know you are connected to the Internets.
And this is my iMac connected to the internet though my iPhone. You can see the packets being exchanged.
In the event of a disaster, I'll be able to connect to the Internets with my MacBook Air on the road. Awesome.
As you can see - carriers in Japan dont allow tethering - how about in your neck of the woods?