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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 use KingKing in Hong Kong ◆◆◆
You can now use the full KingKing service via Wi-Fi connectivity here in Hong Kong! This allows you to get used to the user interface and app features before your trip. Download now to enjoy the convenience of KingKing!

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 may also make/receive video calls to/from other KingKing users.
• You can continue to 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 certain service plan’s 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 http://www.1010.com.hk/kk or http://e.hkcsl.com/kk 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 KingKing Service from 00:00 to 23: 59 HK time during the day (Hong Kong time). KingKing day pass charges will only occur while user has KingKing usage. If you have subscribed to other than the designated Service Plan, we shall not charge you any KingKing 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.

What’s New

Version 2.1.6

Stability improvement

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

WongsterHK ,

Auto connect does not always work

Audio is great but it is very frustrating when auto connect does not work all the time even the phone is connected to wifi network and accidentally pick up international roaming calls due to the flaw. Please fix auto connect!

mcdull2k ,

Good to save some money. But program is buggy

the app is very good in saving cost of distance call. i also use it in ipad so that i can actually make voice call with local phone. the app, however, is very unstable. it would 'forget' the registration setting sometimes and you need to reinstall the app to re-register the phone number. it also disconnect frequently and most importantly, it will not auto-reconnect. when you click call history, it will crash and jump out to home menu.

Garry Eagle Yu ,

can't open

after this update, can't open, blank in T&C page, can't accept, only quit then


PCCW Mobile HK Limited
62 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Traditional Chinese

Age Rating
Rated 4+
© CSL Mobile Limited 香港移動通訊有限公司


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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