I have tried to follow the Tzones fix for my mobile isp but it does not seem to work, i.e. create a proxy.pac file and change the preferences.plist file. I am using Tesco Mobile in Ireland which uses port 8080 and proxy have all the details but can not get it to work Have run the field test app and according to that it iPhone is not even been allocated an i.p. by the network. If anyone knows what I can do to get this to work I would be really happy.