I recently purchased a used 4s from a friend. His phone was originally purchased in Germany. When I received the phone, he had wiped out all his settings and data, and I restored it with USA settings, my apps and data, and changed it to English language. But now I notice that the few apps I have that show ads are all in German and from German businesses. Of course ads are a nuisance anyway in any language, but just wondering if there's something I neglected to change over when I set up the phone. Or does it rely on some embedded info that shows where the phone was originally purchased?