How to send text messages when roaming in Hong Kong?

If the mobile phone card in Hong Kong has been roaming, you can receive text messages or phone calls from the mainland, and the same is true. If not, will you see any missed calls? There is no signal when roaming to Hong Kong without opening a mainland mobile phone, unless there may be another one near Shenzhen, New Territories. For more service benefits, click on "official website" customer service 222 below to answer your questions.