The only reason I consider a smartphone a necessity is private and secure messaging and calls on the go. I can’t imagine having to be at my PC for longer calls with my family or non-gaming friends, and as a woman I absolutely refuse to go outside when it’s dark without a phone.
So since I already have to have a phone I use it for other things like Lemmy, music, podcasts, public transit and the odd entertainment app. It’s perfectly fine to not have a smartphone if you don’t need any of those things though.
So there is no problem then, since by your own word naturally occurring differences aren’t unfair. Trans women who transition even put themselves at a disadvantage compared to pretransition.
Oh and trans women are real women, just like any other woman. They are not second class women, or “kinda women but really not”, they are 100% women. Same goes for trans men. And the whole “biologically male/female” strawmen has never been true but still evolved into this transphobic talking point to justify hate.