I-635 dispatch radius kills your callback window
A 2-truck shop covering Mesquite, Garland, and Sunnyvale runs tight service-area math when a no-cool call comes in from Bruton Terrace at 6pm. Your nearest truck is wrapping a coil swap in Balch Springs; the callback lands in 18 minutes. The homeowner already called two other shops while you were routing. I-635 and Highway 80 corridors mean 12–22 minutes between jobs during evening rush, so missed calls from Town East or Range Oaks turn into lost bookings before your dispatcher even pulls the voicemail. Narlo replies in 10 seconds from the missed call, qualifies the address and system age, and holds the customer while your truck finishes the Balch Springs job. The booking goes straight into Jobber with the Old Mesquite address already mapped.