Enabling GPS services is essential for providing accurate location data as it relies on satellites rather than cellular networks, which is beneficial in areas with weak cellular signals. Disabling location services would prevent the device from using GPS to find its location. Only having WiFi enabled would not guarantee accurate location data in areas with weak cellular signals since WiFi is typically used as a supplementary method when GPS is unavailable or to enhance the accuracy of location services. Airplane mode disables all wireless communication functions, including GPS, making it an incorrect choice for the technician's needs.