And the NSA already done it with phones in the western hemisphere.
Sorry you can't bring me to believe one or another is better or worse.
And again, if I would care, I would stop using ANY smartphone.
Did you know that there is a law in Germany installing a trojan horse on your device is legal? Search for "Bundestrojaner". It has been used. Moreover, they can install it on every device, no matter from where you are. And you know, Germany is not the most technologically advanced country in that regard.
Expect a lot of other nations having tools to listen top your smartphone more or less.