Hong Kong boy band Mirror member Stanley Yau Sze-chun recently lost his iPhone in the city and was surprised to discover it had surfaced at a market in neighbouring Shenzhen, sparking heated discussions on the internet. Information technology experts noted that retrieving lost or stolen devices from mainland China can be difficult. The South China Morning Post talks to experts for advice on how to handle the immediate frustration of losing a smartphone, and how to prevent data breaches before it...