No plans with a phone number or SMS are available from yaySIM for Hong Kong. All eSIM plans that the provider sells to travelers in Hong Kong are data‑only.
Travelers who need voice or messaging can use popular VoIP applications such as WhatsApp, Telegram, and iMessage over the data connection. However, some destinations may block or restrict access to specific apps or VoIP services, so it is advisable to verify that the apps you rely on are accessible in Hong Kong before purchasing a plan.