What not to do to the vehicle
Avoid screwdrivers, coat hangers, hard wedges, and forcing the window seal. Modern vehicles can have side airbags, wiring, weatherstripping, and trim that are easy to damage.
Details that help the call
Have the vehicle year, make, model, exact location, and whether the key is visible inside. If the vehicle is running, blocking traffic, or a child or pet is inside, treat the situation as urgent and call 911 when safety is at risk.