Your privacy is invaded when you use any phone, get in the internet at all.
Edward Snowden showed those that didn't realize, how much we are all tracked. Those that didn't know after Edward Snowden, should know now. Apple also participates in PRISM. This spying isn't new in the USA. NSA has been around since Pearl Harbor and has been spying on the American public since then, we know this, that isn't a question. This all came out during Watergate and the Church Committee Hearings.
Other countries have been saying even longer and even more. It doesn't matter who your phone carrier is, who the phone is made by, doesn't matter if the company itself collects the data or they use a third party app.
You don't have privacy and changing phones will not change that.
Oh and if your government isn't doing the spying, they are having the USA or UK spy on their citizens for them.
"If there’s one striking thing about those*PRISM*slides, other than their hideous aesthetics, it’s that Apple’s allocated yellow oval, instead of a date, has the words “(added Oct 2012)” underneath it. That difference is most striking when you consider the fact that Apple competitor Microsoft cooperated with the government a full five years earlier.
The company, which*denies*ever having heard of PRISM, released its FISA request numbers today, starting on December 1st, 2012, through this May 2013. Though it’s plausible that the government would not have disclosed the name of the program, the*NYT*confirmed*Apple’s participation in a government surveillance network designed to make data collection more efficient for the NSA — whatever that entails, like “a broad sweep for intelligence, like logs of certain search terms.”
http://techcrunch.com/2013/06/17/apple-nsa/