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Home       Value-added Services       ST WiFi Calling
ST WiFi Calling
ST WiFi Calling
Stay connected without worrying about network interference
Enjoy the voice call features that you are accustomed to
When you encounter mobile network interference overseas or locally, simply connect to WiFi to make and receive calls through "ST WiFi Calling“, allowing you to stay connected.
  • Continue with your usual call activity. Supports voicemail, missed call notifications, call waiting, and share your phone contacts to stay connected conveniently.
  • Supports dual SIM and eSIM.
Service Service Fee*
SuperCare Smartphone Plans ExtraCare Smartphone Plan
ST WiFi Calling Free HK$8 / day^

ST WiFi Calling is available to customers of SuperCare Smartphone Plans, ExtraCare Smartphone Plan and other designated service plans.


Steps: Connect to WiFi, then open the "ST WiFi Calling" app and keep it running in the background to make or receive calls



*   Download, usage and content update of this service will incur data (including local and roaming) which will be deducted from relevant subscribed service plans or charged at the applicable thereafter fee. For customers without a data plan, standard data charges will apply.
^   Day charge is applicable to customers of ExtraCare Smartphone Plan and other designated service plans. A day is defined as 00:00-23:59 Hong Kong time.

The use of WiFi may incur charges levied by third party WiFi service providers.
Outgoing calls to non-Hong Kong phone numbers will incur applicable IDD charges.

  • This service can be used on designated smartphones running Android 5.0 or above and iOS 9.0 or above. For Android™ smartphone which does not support Google Play services, the Value-Added Service will not be applicable on the smartphone.
  • Subject to relevant terms and conditions. Please refer to T&C-V058 for details.
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