What's my expectation of privacy in a cellphone call?

The answer: not very much at all. But you knew that already, when the NSA and related scandals broke earlier this year. The good news is that an organization has made the FBI release records of its of cellphone surveillance technology. Article here.

From the article: "The FBI says it uses the tools to track the locations of individual suspects. But the technology is controversial because, by design, it collects data on innocent bystanders’ phones, and it also interferes with cellphone signals in a way that may be prohibited under a section of the federal Communications Act."