Something interesting for those of us who have got an iphone from Tesco:
The e-mails that you receive all state that the tariff includes unlimited data. The IPhone 4 sim pack including leaflets with details about your tariff confirms that it includes unlimited data. And to top this off
http://phone-shop.tesco.com/iphone-help-and-faqs/iphone-help-getting-started.aspx#26
(save it as evidence) has an iPhone 4 logo at the top and states again unlimited data. It looks like they planned to give out unlimited data and changed last minute to follow the other networks.
Maybe someone else can confirm this for me, but doesn't mean that tesco have to offer this or they will be in breach of contract, meaning you can cancel the contract and keep the phone?