I can hold my phone in one hand, and type with just my thumb, and my thumb covers the full spread of the keyboard. Or I can type with two thumbs for things that

I can hold my phone in one hand, and type with just my thumb, and my thumb covers the full spread of the keyboard. Or I can type with two thumbs for things that are longer than a few words, and again reach the entire keyboard without shifting grip. But also I don't type much - in fact as little as possible - on my phone, and certainly not code. I will switch to my laptop for anything more than a few words if it's possible.