I used to use a 4 inch phone and I could type with the on screen keyboard really fast with little error (partly thanks to all the texting to my wife, then-girlfriend).
Then a few years back I switched to a 5 inch thinking bigger must be better for everything, but immediately found myself typing a lot slower with more mistakes. At first I thought new phone, different shape,size,weight I just needed to adjust. But after a year I still miss the old phones keyboard.
Btw its windows phone 7 vs 8 so the keyboard was practically the same other than size... Only thing I could think of was the lack of separate volume for the clicking sound so the new one is always too quiet.
Fast forward to about a month ago, now the phone is upgraded to windows 10 for a while. I was playing around in the settings and found that you can change the keyboard size from large to medium or small. I don't remember if it was defaulted to large or I changed it.
Why would anyone want to make the keys SMALLER? but then I miss my old phone smaller keyboard so why not try...
Omg I am typing just as fast on this phone as I did on the old phone. Is it the closer together keys? Further away from the edges? I don't know but this is a curious and honestly counter intuitive discovery for me.
I typed this whole post in landscape small size keyboard on my 5 inch phone. Pretty fast. Phew.