April 2010 update: Telstra (my cellphone provider in Australia) now allow tethering from the iPhone. The only problem is that I can’t tether my iPhone to my iPad. So… MyWi is the best option. I ALWAYS have my phone with me so having a 3G iPad is crazy, an extra data plan when I already have one is stupid. Just create a wifi network using MyWi on the iPhone and then connect to that network with the iPad…. Easy
UPDATE! Apple have killed the workaround detailed below with their 3.1.2 iPhone software update. There is an alternate way to do it though (and it gives a great new feature!) See this link
Found this last night on the web and gave it a try – works perfectly! It could spell the end of my Bigpond wireless data USB dongle!
TELSTRA USERS ONLY :
Type the following address straight into the Safari Browser on your iPhone.
Telstra with APN of ‘telstra.internet’
Telstra with APN of ‘telstra.IPH’
If you don’t know which APN to choose, use the first one.
Remember you need 3.0 GM installed to use this update. Apple could break it any day now and who knows once the public 3.0 software is released.
Nice fast connection, very easy to establish too! Here’s a few screengrabs from my iPhone during the tethering process and when a connection is established.