I've got the same issue here as well with my phone.
O2 are sending me a new sim but I'm pretty sure it won't work as iv tried mates at work and it's no better on my phone!
All the settings are correct and whats the weird thing is i had to send my first Desire back as the Mic was broken on it but the inter was always on H now with the replacement phone it's stuck on G pretty much all the time!
Whats the software fix?
O2 are sending me a new sim but I'm pretty sure it won't work as iv tried mates at work and it's no better on my phone!
All the settings are correct and whats the weird thing is i had to send my first Desire back as the Mic was broken on it but the inter was always on H now with the replacement phone it's stuck on G pretty much all the time!
Whats the software fix?