O2 pulls the Android 2.2 update for the HTC Desire soon after its release0
Unfortunately, O2 UK didn't provide a time frame at this point regarding when they'll resume with Froyo's roll out. However, some owner are reporting that the update installed correctly and isn't causing any problems with their handsets. Just to play it safe and preventing any additional problems from arising, O2 UK is going to indefinitely keep things at a standstill until they get to the bottom of it all.
HTC Desire Specifications | Review