During the transport phase of an ambulance call, it is most important to prioritize the safety and well-being of the patient. This may involve monitoring vital signs, administering medical treatments, and ensuring that the patient is securely and comfortably positioned in the ambulance. Additionally, it is important to maintain communication with the hospital or other medical facility to ensure that the patient will receive appropriate care upon arrival. And also, to follow the protocols, procedures and laws that regulates the ambulance service to avoid any legal issues.