Good luck trying to scan my Windows Phone! Bwaahahahaha! Sometimes being the oft-ignored sector has its benefits. The phone may be crackable, but no one bothers to try.
References: All of those arguments about Linux and Mac being super secure back before there was enough market share for people to care to try to attack them.
I'm sure your windows phone totally doesn't have any legacy Win32 bugs hiding in your Windows 10 mobile OS. That mantra you're using from the 90s only applied because Linux didn't have as large a legacy codebase in the field. Taking your argument to the absurd, I can claim my BeOS machine is one of the most secure on the planet because nobody uses it and it's a beast of a different color.
"Engineering meets art in the parking lot and things explode." -- Garry Peterson, about Survival Research Labs