I know people are saying different things but an O2 CS person just said that even if you use a 3GS iphone contract sim in your iphone4 they will know and require you to change to one for an ip4 contract therefore loosing your unlimited wi-fi.
Has anyone else heard this? Or has any actual evidence that they wouldnt be able to tell?
I'll probably ring again in a bit to speak to someone else and see what they say.
Not sure if it is true, but it is possible. Depending on what method iP4 uses for data usage, they might be able to tell. They can tell the difference when using a SIM contracted between B'berry and iPhone based on the difference between the data going via iData instead of B'berry.net. So not sure if the iP4 data will be routed differently than the previous iPhone's.