Download the "KingKing" voice roaming service

Download the

Connect with your relatives and friends in Hong Kong via the "KingKing" app for free* while traveling aboard!

Free download now!!
Click on the icon to go to the "KingKing" app download platform
google play

Apple Store

If "KingKing" app download is unsuccessful using the above methods, please go to Google Play or App Store and use "csl" as the search phrase.

*Using "KingKing" service with Wi-Fi connectivity will result in no charge(3) for

  • making outgoing voice calls to Hong Kong phone numbers or receiving voice calls;
  • making outgoing and receiving video calls via "KingKing" service. Charges for Wi-Fi connectivity are not included. For details, please visit

Online Shop
Data Usage Calculator
Smartphone Workshop
Smartphone Encyclopedia
csl Facebook Page
csl YouTube Channel
csl Instagram