Check your analytics and you’ll likely find most visitors are on mobile but most form submissions come from desktop. That gap isn’t a coincidence — it’s friction. Forms that feel fine on a laptop can be quietly painful on a phone, and the pain shows up as abandonment.
Wrong keyboards and a hidden submit button
When an email field opens a full alphabetic keyboard with no @ in reach, or a phone field doesn’t bring up the number pad, every entry becomes a small fight. Set the right input type on each field so the phone shows the right keyboard automatically.
Then there’s the submit button hiding behind the keyboard. On many phones the keyboard covers the bottom of the screen, and if submit lives there, people can’t find it. Keep the action reachable.
Tap targets and forgiving validation
Fields and buttons sized for a mouse are hard to hit with a thumb. Make inputs tall enough to tap and space them so people don’t fat-finger the wrong one. And go easy on validation — rejecting a number for formatting, or clearing the whole form on one error, feels punishing on mobile where retyping is slow.
None of this is visible on your desktop preview. Fill the form out with your thumb on a real phone, and the friction becomes obvious immediately.