I got my iPhone 4 yesterday.. don't have wifi at my home yet so been heavy data downloading over 3G. Got it on Three with 'The One Plan' (excellent signal where I am compared with Vodafone). My mobile network data usage on the iphone tells me I've sent 41MB and received 453MB. However on the Three site it says I have 795MB remaining (and I have a total of 1GB allowance). It says the amount is correct as of about 5 minutes ago.. Is the iPhone incorrectly reporting the amount used?