100% of access attempts on iOS devices by the NSA are successful. Buying an iPhone is data suicide.
but even if that's the case though, do you really think androids are that much more secure? anything that reaches mass market becomes more vulnerable.
Apple and Google freely hand over the data. Using any of their products is what I like to call "data suicide".
iOS is the worst since it is closed source and can't be modified in any way.
Android is not good, but a little better since it is partially open source and can be modified.
It's recommended (by Jacob Applebaum for example) not to use mobile phones at all.
But if you really need them, use Cyanogenmod.