I was stupidly excited about the release of the iPhone 3.0 firmware, for the primary reason that you would be able to use the iPhone for internet tethering. In layman’s terms, you can use your iPhone as a modem to the 3G phone network. This is the number 1 feature i missed from my Nokia phones.

However, when the firmware came out and I tried to enable tethering I was bitterly disappointed to find the message “Please contact your network provider to enable tethering”. But after a bit of Googling I ended up back at Whirlpool forums where some users have made scripts which you can run on your iPhone to unlock the tethering. Here is the thread I used to get tethering working for Optus:

http://forums.whirlpool.net.au/forum-replies-archive.cfm/1219715.html