That's true, but different companies have different standards of manufacturing. Apple, for example, exert extreme control over their products, right down to the

That's true, but different companies have different standards of manufacturing. Apple, for example, exert extreme control over their products, right down to the silicone. Short of a potato, they offer the highest degree of certainty and protection. Meanwhile, Qualcomm has several programs running below the OS level that track users "anonymously" in various ways. Such systems can much more easily be co-opted by other parties such as governments.