Once I was aware of the latest iPhone update from Apple Inc. I downloaded it as soon as possible. My phone is now at version 2.02.
I have already noticed some improvements. Whilst at work, in a certain part of the office, I can now get 3G and at home last night I got Edge where I have never got it before.
I hope that O2 upgrade more of their network soon as I am sure that Apple are trying their best to improve matters.
Whilst reading the web I found a useful piece of data; select the phone keypad and enter *3001#12345#* and you will see a set of screens related to field tests. Press the home button to exit.