I use dvorak, on an Ergodox at home and a TECK at work. My phone keyboard is changed to dvorak .
The only times I have to use someone else's keyboard, it's only for maybe a word/login here and there, I'm not typing novels.
I'm very happy I've switched to dvorak on ortholinear keyboards.
 Dvorak is not a great layout for phones, it's good when using two thumbs, but all the switching from left to right side is bad for single-finger or single-thumb typing.