Highway 121 radius math kills callback speed
A solo truck or a three-truck shop in Euless typically pulls calls from a fifteen-mile wedge: Bear Creek north to Grapevine, south through Irving, east across Hurst into Bedford. If a water-heater failure hits at 9pm in Colleyville and you are finishing a sewer-line camera run near Loop 820, the callback window closes before you pull into the driveway. Narlo sends the SMS reply in ten seconds, asks for the address and the symptom, and puts the appointment on your calendar while you are still on the road. By the time you check your phone at the next red light on Highway 183, the job is booked and the customer has a day and a two-hour window. You do not lose the call because you were twenty minutes away from a charging cable.