Android 2.2, HTC Desire, Orange and USB Tethering

This problem drove me mad for some time before I finally found a fix. I can't claim it as my own but I thought it was important to share it with everyone to save them the same stressful time as me.

The Problem
You have a HTC Desire on the Orange network and have eagerly upgraded to Android 2.2 operating system. After doing this you notice that both the USB tethering and WiFi hotspot functions are not working. After much diagnosis you discover that the problem must be with the phone.

I was exceedingly luck to speak to one of the helpful and knowledgeable operatives at Orange. Most of the time you'll get the answer "It's not supported"

The Solution
Is surprisingly simple:-

Menu/settings/Wireless&Networks/Mobile networks/Access Point Names

You should see the following three APNs;

Orange Internet
Consumer Broadband
Orange MMS

You will note that 'Consumer Broadband' is not present in 2.1. Select this option from the menu.

CHANGE the APN from "consumerbroadband" to "orangeinternet"

CHANGE the Username to "Orange"

CHANGE the password to "Multimedia"

Authentication type should be set to CHAP

Press your Menu button, tap "Save"

You should now find that the USB tethering and the WiFi hotspots work again.