During a nor'easter with a pipe letting go, nobody waits for your homepage animation.
The customer is not browsing
The heat quit and it is nine degrees. Ice dammed the gutter and water is coming through a bedroom ceiling. A pipe in an unheated wall let go overnight.
That person is not evaluating your craftsmanship. They need three facts fast: you handle this, you come to their street, here is the number.
Assume the worst connection
Everyone calls at once during a storm, granite and brick swallow the signal, and a nearly dead handset starts slowing itself down. Those three arrive together, every time.
Design for that worst version and the easy version takes care of itself. Words render first, pictures follow, and nothing from another company sits between the customer and your phone number.
Emergency terms at the top
Overnight coverage belongs in the first screenful of the service page. Burying it behind a footer link is the same as not offering it.
Then define it. Phones staffed until ten. We ring back inside an hour. During storm weeks we work worst-first and the rate goes up. Leave it fuzzy and people assume the answer is no.
Buttons a gloved thumb can hit
February, water over the boiler, phone in one gloved hand. Links the size of a pencil eraser packed together simply do not get hit.
Give the call button real size, pin it so it stays on screen as they scroll, and leave dead space around it so nothing else catches the thumb.
Test it in the situation
Next time you are on site with weak signal, try booking yourself through your own form. Put a stopwatch on it.
The result usually lands badly. What you signed off on a big screen and what a customer meets on a phone are not the same website.