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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

1.9 out of 5
65 Ratings

65 Ratings

1010 user ,

Why has it be connected to Wi-Fi?

Should be working under the mobile data mode instead of can only be used with Wi-Fi connection.

Haywoodcox ,

Auto connect always not work and must need Wifi

After the app launch so many years. The auto connect function still always not work due to the app will hang or quit itself after inactivity for a while.

Moreover, when you travel and buy the day pass, you want necessarily connect to WiFi anymore, meaning that cannot use this app for voice call if have data roaming which is no use at all. Suggest King King should not limited to WiFi but 4G as well when in roaming status.

Antony Chen iPhone 5 ,

Worst experience so far

For calling app, the experience from KingKing is the worst so far. Every time when I make a phone call, if the screen gets dark due to auto energy save, the phone call disconnected at once. So when I want to make a phone call overseas, I need to set the screen to “on forever” mode and watch very carefully that nothing covers the light sensor to prevent the screen gets dark. Having done so, have of my phone call got disconnect regardless.


PCCW Mobile HK Limited
62 MB

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


English, Traditional Chinese

Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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