FYI and possible interest, here is an article describing how Apple saves four months of call data of phone calls you made from your iPhone. While I don't care, some people might take exception to having certain metadata retained from their private iPhone calls. The article points out that Common Carriers -- At&t, Verizon, et al -- maintain a similar record for two months. Seems like, in this electronic age, Google or Apple or ?, all keep track of what you're doing. Of course, I'm sure you're already aware that Google tracks you, but may not have been aware of Apple's policy on the iPhone. I wasn't.
Jim Hamm