1O1O/csl's KingKing is a VoIP application, based on Wi-Fi connectivity, for use in Hong Kong and while you are abroad. It offers FREE[3] voice call minutes for making outgoing calls to any Hong Kong number and receiving incoming calls from anywhere in the world. Above all, KingKing will save you huge voice roaming expense! ★ Now you can use KingKing in Hong Kong that allows you to get used to it before your trip ★ KingKing means: •You can make/receive call, regardless of whether the called person is on a fixed-line or served by a mobile service provider. •The person you call, or who calls you, does not have to be a 1O1O/csl's subscriber or install the application. •You can use your current 1O1O/csl's number and have your caller ID displayed for people you call, or who call you. (Available only to 1O1O/csl certain service plan's subscriber) Terms & Conditions: [1] KingKing (KK) is only available to 1O1O/csl's certain service plan subscribers and is provided to you under the terms and conditions of your mobile service contract. [2] KK is compatible only with certain handsets, click or for details.We cannot guarantee KK service performance on handset models not listed, nor call quality at every single Wi-Fi hotspot. [3] If you have subscribed to designated Service Plan, we shall charge you HK$8 daily for your use of the KK Service from 00:00 to 23: 59 HK time during the day (Hong Kong time). KK day pass charges will only occur while user has KK usage. If you have subscribed to other than the designated Service Plan, we shall not charge you any KK service charges. However, you shall pay the charges for the Wi-Fi connectivity service, IDD and or international roaming services (if any). [4] KK may be used to make emergency calls in HK. However, while you are abroad you should call local emergency number via your regular voice roaming service. [5] We shall use your 1O1O/csl mobile number for verifying your eligibility for the KK service, and for the billing of your use of the service in the corresponding 1O1O/csl account by 1O1O/csl.

Available on

Mobile device

Mobile device

System Requirements

OS Windows 10 Mobile, Windows Phone 8.1, Windows Phone 8
Architecture ARM
OS Windows 10 Mobile, Windows Phone 8.1, Windows Phone 8
Architecture ARM

Additional info

Published by

Approximate download size
5.92 MB


This app can
Use your rear- or front-facing camera
Use your microphone
Use your contacts
Use an anonymous Microsoft account
Use your music
Use the media items that are currently playing
Use your device network services
Send push notifications
Use any of your Windows Phone sensors
Use your device’s voice over IP (VoIP) services
Access your browser

Get this app while signed in to your Microsoft account and install on up to ten Windows 10 devices.

Language supported
English (United States)

Publisher Info
Publisher Website

Ratings and reviews

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Platform: Mobile

Great app backed by a stable connection and great voice quality.




Platform: Mobile

Rarely works, even with rock solid Wi-Fi. Slider may stay and connect but 75% of time it just won't connect. Shut down and restart to no avail. Blind luck as to when it may or more likely may not work.

One person found this helpful.




Platform: Mobile



Ka Chun

Platform: Mobile




Developer comment · responded on