How Apple's iOS Went From Insecure To Most Secure
GMGruman writes "There's no such thing as a perfectly secure operating system, but security experts agree — somewhat grudgingly in some cases — that iOS, Apple's mobile operating system, is the most secure commercial OS today, mobile or desktop. It didn't start that way of course, and Robert Lemos explains what Apple did to go from insecure to most secure."
An ultimately secure OS would be the one that does not do anything at all. No inputs and no outputs. Perhaps iOS is closer to that ideal than any other.
Jailbreaking is not really a security problem. Firstly, because "jailbreaking" just means allowing unsigned code to run.
Why don't you re-read that and tell me where your logic flaw is.