Emergency calls, ringing out
Today
The phone goes while you're elbow-deep in a repair. It rings out, they call the next number on the list, and the job's gone before you've dried your hands.
What I'd build
Click-to-call everywhere on the site, backed by a text-back promise: a missed call gets an automatic "got you, back to you within the hour" message, so the caller waits instead of moving on.
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