It seems that your iPhone could be tracking user data.
As much as you may like your iPhone and Apple’s products in general, there’s still money to be made and trends to be learned in tracking user data. Over at Uneasy Silence, the boys have found code strings between the Stock and Weather widgets that send data back to a specialized server URL which allows user information to be collected.
When the widgets perform a query an IMEI is handed off to Apple’s servers:
dgw?imei=%@&apptype=finance
This let[s] Apple knows which app you are using when connecting with your iPhone. Obviously, they know the IP address you were using, the stocks companies you are interested [in], and so they can track down their customers all around the world. This also proves that there are probably other apps that do the same. Weather.app is also acting the same way. (Offset 13AE0)
Any attempts to modify the URL to exclude the IMEI information will not allow you to retrieve any information in the “Stocks” and “Weather” apps. It is still unknown if any other applications leak information to Apple HQ.
Unfortunately, the user base seems to have agreed to surrender this information when it complied with the end user license agreement and thus all kinds of information can be collected and used beyond serial numbers, date of purchase and information relating to a service or support issue.
Source: iPhoneAlley