Mobile-only is a larger segment and growing. "ipad kids" are at the age where they are "iphone teens". And it's also the segment of people who care most about phones.
Apple made smaller phones, but they don't sell. They don't sell when they are nice phones, but smaller, and they don't sell when they are cheap phones and smaller.
Tech people are like car people in that they don't really appreciate that their preferences are niche. Wanting a smaller phone is akin to wanting a smaller car
> with relatively normal hands, can use their phone with one hand.
According to the US Army, the average length of the male thumb: 2.75 in; for women it's 2.49. So we can assume the actual population averages are probably a bit lower.
That means the average iphone is larger than the average male thumb, by a reasonable amount, and it has been for quite a number of generations.
Personally, my thumb is as wide as my iphone, but practically, the way I have to hold it one-handed means that I can only reach half of the screen (technically, the bottom quadrant, so 25% of the overall screen area). I'd need another 1" or so to reach the entire width of the screen with a single hand, and idk 2"+ to navigate the entire screen one handed.
The disconnect probably comes from what it means to "use" a phone one-handed. I mean to be able to hold it in one hand and touch anywhere on the screen and perform any action. Which limits phone size to around 2.25"x4.50", or so to account for a average hand to hit 95% of surface area while holding it. You might mean, just be able to type, or just be able to scroll, which does change things.
> Apple made smaller phones, but they don't sell. They don't sell when they are nice phones, but smaller, and they don't sell when they are cheap phones and smaller.
They funny thing is that the sales numbers were only terrible compared to other iPhones. IIRC it was something like 3% of the iPhone market at the time of discontinuation. Not a big seller for Apple, certainly, but there were times when the Mini made the top ten list for smartphones in general.