Hi, I've bought an iPhone and I am considering buying a seperate contract (am currently on PAYG). The contract is minimum of 30 days and is £9.99 a month, pretty good. Unfortunately though I run apps which have annoying ads etc, how do I disable the Internet. I want to use 3G calls but without 3g internet, just using Wifi. See I want to keep Push Email on but it only to work on Wifi. I tried changing Celluar Data Network Username, Password, Server but it still works!!! I really don't want to use the Internet but some apps call out to adverts and you end up paying big time, I don't want this. Does Roaming Charges "OFF" fix this?