Has anyone else experienced drastic loss of signal after updating to Android 2.2 Froyo. It may be coincidence and maybe there is a transmitter down somewhere but it is really annoying me now. 
It works sometimes but just drops right off. I have been trying to use the wifi hotspot that i heard so many good things about but there is no signal and won't connect.
My wife had to send her desire back to 3 network twice when it caused problems with hers but it is working lovely now, I am dead jealous of hers
The network is orange. signal and mobile network was fine before update.
Any tips or advice gratefully received

It works sometimes but just drops right off. I have been trying to use the wifi hotspot that i heard so many good things about but there is no signal and won't connect.
My wife had to send her desire back to 3 network twice when it caused problems with hers but it is working lovely now, I am dead jealous of hers
The network is orange. signal and mobile network was fine before update.
Any tips or advice gratefully received