To travel to Hong Kong, do I need to open international roaming on my mobile phone?

* * Yes * * Traveling to Hong Kong requires international roaming and traffic. If your mobile phone is GSM, M-Zone, Shenzhouxing and other brands, and international roaming service has been opened, you can directly use your mobile phone number and international roaming service when you go to Hong Kong. If your mobile phone has no international roaming service, you need to open it in China first, and then go to Hong Kong. After entering the country, you can buy a calling card to open international roaming and traffic services. Before going to Hong Kong, it is recommended to call the customer service phone of Hong Kong Mobile to find out the specific operation steps.