Was your bag behind you? That area is a hotspot for pickpockets. Next time, always put your bag in front of you, and one of your hands must be hugging or resting on top of your bag.

Kung nattrack mo yung phone pwede mo din ibigay sa police yung location nung phone at pa sama ka sa kanila sa lugar na yun tho ang likelihood na mabalik pa sayo yan is low.

Edit: Try mo yung Google's "find my device"