@ankit_anubhav#IQ is a useless measure, and even if it weren't, I doubt you'd find any correlation with iPhone use (except to the extent that wealth correlates with both the broken IQ measure and Apple-device ownership).
The good news is that most mobile users don't have #iOS — #Android is holding steady with about 70% of the global mobile market, making it (or, if you prefer, #Linux) the most-popular consumer OS in history.