Call Manager

To help you manage your calls conveniently, CMHK provides the following call management services:

Call Manager

CMHK postpaid customers can take control of a maximum of 5 numbers in a single mobile phone via an app namely “Call Manager”. You can choose any of your secondary numbers to be shown on your counterparty's mobile with caller display function. Another function of the app is to let you know which number your counterparty is calling. What’s more? You won’t miss any SMS sent to your secondary numbers.This service also support under roaming* situation


Ease Communication To swtich your mobile numbers for making or receiving calls and sending or receiving SMS freely.  
One APP for Multi-Number Easily to manage Multi-Number without switching numbers, changing mobiles or call forwarding.
Privacy Protection Secondary mobile number can be switched on or off as your privacy protection.   


Feature & Edge

  • You can recognize the incoming call/SMS whether to primary or secondary numbers.
  • You can select to use your primary number or any of your (mobile) secondary numbers to make a call/SMS, the choosen number will be displayed on recipient’s handset.
  • Secondary numbers can be switched off subject to your need

Secondary Number

  • Secondary number can be a random mobile number designated by CMHK.
  • 3 mobile numbers + 1 fixed-line number can be used at the same time. You can subscribe or deactivate your secondary numbers anytime.



 Call Manager Secondary Mobile Numbers

Mobile Numbers Fixed-line Numbers
Make Outgoing Calls Support, the chosen number will be displayed on recipient’s handset. Do not support
Receive Incoming Calls Support, you can recognize the incoming call whether to primary or secondary numbers.
Send SMS Support, the chosen number will be displayed on recipient’s handset. Do not support
Receive SMS Support, you can recognize the incoming SMS whether to primary or secondary numbers. Do not support
Switch On/Off Support



  • $15/month per secondary number.

Due to system upgrade, new application of the “Call Manager” service will be temporarily suspended until further notice. We apologize for any inconvenience caused.

Android Version

Download “Call Manager” Click here

iOS Version

Download from APP STORE Click “Call Manager”



  • Some handset models cannot fully support the functionality of Call Manager.
  • iPhone does not support use secondary number to make call during roaming.
  • In addition to the "Call Manager" mobile application, customers can also choose the secondary number at MyLink, CMHK website, 24-hour Customer Care Hotline, CMHK Shops or Customer Center from the randomly provided numbers.
  • 1CMN subscriber cannot enjoy message prompt feature at 1CMN regions, therefore, no called number information can be provided.
  • All voice & SMS will be charged as primary number (according to the “Primary Number” service plan of “Call Manager”)
  • To change a secondary number, you have to deactivate the secondary number first, then apply a new one. 
  • Secondary Number cannot apply to Call Forward and Voicemail service.  Secondary number will be forwarded to designated number or  primary number’s voicemail upon the setting of primary number.
  • After conditional call forward has been set up to voice mail or SMS secretarial service for 'Call manager' primary number, any incoming call to the secondary number during abroad will be forwarding to voice mail or SMS secretarial centre as well, while two-way roaming fees will be charged.
  • Call Manager's secondary number does not support VoLTE service. Therefore, the call will be connected via normal voice network.
  • If subscriber is having a VoLTE call, all incoming call from secondary number will neither be connected nor re-directed to voice mail box. Moreover, subscriber's mobile phone will not ring and hasn't a missed call record.


+Fixed-line number as “Secondary Number” could support incoming calls only, it cannot make any outgoing calls.

*Call Manager could support making calls to 25 particular destinations via primary or secondary number in roaming area/countries where supported call back services. Customer simply input(+) or (001)+ (Country Code)+ (Area Code)+ (Telephone Number) via the mobile application and the charge is as same as make call by using Roaming Call Back Service .  For China 1CMN customer making call at China via this app, the charge will be same as China "1-Card-Multi-Number" Roaming Call Back Service. Macau 1CMN customer cannot use this service at Macau. 25 particular area/country which support making calls to included Hong Kong, Canada, Singapore, USA, Taiwan, Japan, France, South Korea, UK, New Zealand, Malaysia, Vatican City, The Netherlands, Italy, Germany, Australia, Thailand, Philippines, Indonesia, Macau, India, Brunei, Bangladesh, Pakistan and Vietnam. (This service is not applicable for secondary number in iOS version)



Special Features

Terms and conditions


Call Forwarding Package


You can forward incoming calls to a designated telephone number anytime under the following circumstances. If you have subscribed to our Voice and Fax Mailbox service, all incoming calls will be automatically forwarded to the mailbox.

All Call Forwarding

All incoming calls will be forwarded to a designated telephone number.

Busy Call Forwarding

When your line is busy, the incoming call will be forwarded to a designated telephone number.

No Answer Call Forwarding

When an incoming call is not answered in 20 seconds, it will be forwarded to a designated telephone number.

Remote Call Forwarding

If you do not have your handset with you or it's out of battery, you can use any tone phone to call our 24-hour Customer Care Hotline at 2945 8888, follow the voice prompts, enter your PIN end forward your call to any phone number you like.

Unreachable Call Forwarding

Incoming call will be forwarded to a designated telephone number when your mobile phone is switched off or outside the network coverage.

* Not applicable to PEOPLES 0 service plan. Call Forwarding Package monthly fee for $50 service plans is $8 only.

Set Up All Incoming Call Forward

Simply log onto 1cm website with your CMHK mobile phone number & 6-digit customer password, you can set up all calls forward on your own by completing several steps! To set up, please click here.

Voice Mail

Basic Voice Mail Premium Voice Mail
$251 $432
Record your own message and send it to any phone number
Voice messages can be forwarded to any phone number
Callers can choose to display the calling number, input other phone number or leave a message Callers can choose to display the calling number, input other phone number or leave a message
Record a personal greeting of up to 30 seconds Record 2 different sets of personal greetings of up to 30seconds each
Mailbox can store up at least 20 messages Mailbox can store up at least 50 messages
Callers can leave a message of up to 60 seconds Callers can leave a message of up to 120 seconds
Messages can be stored for 7 days Messages can be stored for 15 days
  1. For subscribers whose tariff plans have been packaged with Basic Voice Mail service, you just need to pay $18 each month for the Premium Voice Mail service.
  2. While sending the messages to other numbers, subscriber's mobile number will be displayed disregard of Per Line Blocking is in place.

Calling Number Display

$35 / month

Calling Number Display enables you to have a grip on your personal communication, by knowing who is calling before answering.

Call Waiting

$35 / month

The Call Waiting feature enables you to answer an incoming call while you are already making a call. With Call Hold you can make a second call, while you hold your existing call.

When using the Call Waiting and Call Hold feature, subscribers need to pay the airtime charge for the first answered call, as well as the other calls answered or on hold at the same time. (IDD charge is applicable on IDD calls)

Bar Incoming (When Overseas)

$35 / month

Use this feature while you are travelling overseas to avoid unexpected calls to protect yourself from unnecessary expenses, such as airtime and roaming costs.

Incoming / Outgoing Call Baring

$35 / month

Incoming/Outgoing Call Barring means you can block incoming calls or the dialling function of your handset as often as you like to avoid unauthorized use of your mobile phone. Besides, you can deactivate the Call Barring function whenever you want.

Mobile Fax

$35 / month

To establish a closer than ever link with your business partners, Mobile Fax Service enables you to send or receive fax simply by connecting your handset with your portable computer or compatible hardware, such as Ericsson MC16, whenever you are away from your office.


This Value-added Service is not supported by all handset types. Check your handset manual or check the options when buying a new handset.

SMS Secretarial Service

$28 / month

SMS Secretarial Service is available for you 24-hour a day, with professional secretaries to handle all your unanswered calls, making sure no messages are missed.

On-screen Message Alert

We have a team of dedicated secretaries to receive calls and take messages for you whenever your phone is switched off or in use. The messages will be transmitted to you on your handset screen, so you can check your messages and return calls anytime, anywhere.

Personal Reminder

With the SMS Secretarial Service, making important dates and appointments in your diary will no longer be necessary. Simply inform our secretaries of all your dates and appointments, and reminder calls will be sent to you accordingly.

  • SMS Secretarial Service cannot be activated together with the Voice Mail Service.