Ironically Qwerty is extremely well-designed for typing on a touchscreen phone.

Dvorak was designed to have common characters on home keys and common character sequences alternate between each hand.

That's great on a keyboard with 4 fingers on each hand. On a touch screen, that's really bad! Characters close together complicate touchscreen recognition - is it "poet", "peet", or "pout"? And consecutive characters on opposite sides of the keyboard creates lots of movement for a single thumb.

Instead, Qwerty has common characters spread out across the keyboard, and many common character sequences close together (e.g. "-ed", "tion"). Which is exactly the pattern that is fast & accurate on a touchscreen.