Filling out a form on a mobile device can be a bit of a hassle if the
form is not build properly and you need to switch keyboards by hand.
It is easy to build though with inputmode.
CSS-Tricks has a great article about it:
Everything you ever wanted to know about inputmode.
Test it on your mobile:
inputmode=text (default)
inputmode=decimal
inputmode=email
inputmode=none
inputmode=numeric
inputmode=search
inputmode=tel
inputmode=url