No, from 15th June, 2022 onwards, the Add-on Numbers service is available to SmarTone mobile monthly service plan customers only. SmarTone prepaid SIM customers and non-SmarTone customers cannot subscribe to this service or add new add-on numbers.
For current users of Add-on numbers (including fixed-line numbers), service will remain unchanged. Please refer to relevant Terms & Conditions.

You will need to download and install Numbers App on your mobile. The number will be automatically displayed on the Add-on Numbers App once it is ported in successfully.

You can register up to 4 numbers, including registered mobile number and “Easy Number” Mainland Mobile Number.

Whenever you add a new contact to Add-on Numbers’ phonebook, a copy of that contact will be automatically synchronised to your native phonebook with a call prefix (such as 1902 or 1903). This is designed to help you conveniently identify contacts from different add-on numbers.

Whenever a call comes in, the screen will show you the add-on number and label that the call is intended for so you can recognise it.

No. Add-on Numbers does not support call forwarding to another phone number.
When call forwarding to another phone number is being activated for the main number, the mobile numbers under Add-on Numbers will also be forwarded to that number, while fixed-line numbers will be forwarded to voicemail.
If you do not want to forward the add-on numbers, simply turn on “Send Directly to Voicemail” and incoming calls to your number will be directed to their respective voicemails.

Please select the respective number in the app and tap “Settings” on the top right-hand corner, then switch the “Incoming Call Options” to “Send Directly to Voicemail”.

Yes. Your mobile number or fixed-line number will be shown as usual.

Yes. Please select the respective add-on number in the app and tap “Settings” on the top right-hand corner, then switch off “Show My Caller ID”.

lncoming calls will be directed to the voicemail of that add-on number.

Yes. You can make a voice call via the mobile numbers under Add-on Numbers even if there is no data connection, while making calls via fixed-line numbers under Add-on Numbers require data connection.

Simply follow the following steps and you can delete the add-on number in the app:

No, you can’t. If you delete a number in the app, the number can't be used anymore.

If you want to keep the contacts of your add-on number that you intend to delete, please select the respective add-on number in the app and tap “Settings” on the top right-hand corner, then tap “Remove Contacts from this Phonebook” and select the contacts you want to keep. While those contacts will be removed from the respective add-on number’s phonebook, they will be kept in the native phonebook. When you delete the add-on number afterwards, those contacts in your native phonebook will not be affected.

Once you terminated the mobile service for your main number, you cannot continue to use the Add-on Numbers app.

This service can be used on smartphones running iOS 11.0 or above, and Android™ 5.0 or above. This value-added service is not applicable to Android™ smartphones which do not support Google Play services.

No, Add-on Numbers cannot be used to make any emergency calls including 999 and 112. Please use your main number or another phone to make emergency calls.

Yes, you can use Add-on Numbers. Simply go to “Settings” on your handset, select “Cellular”, then set your “Default Voice Line” as “SmarTone SIM” (including physical SIM or eSIM), then you can use Add-on Numbers app to dial out. (SmarTone SIM can be placed at SIM slot 1 or slot 2.)

To add a contact from the native phonebook to your Add-on Numbers’ phonebook, please follow the steps below:

Yes, as long as you’re still using the main number registered to Add-on Numbers. Simply download Add-on Numbers App on your new phone, open the app and follow the instructions to complete the verification process with the same main number. Upon successful verification, Add-on Numbers in the app will be ready for you on your new smartphone.
If you have transferred your contacts to your new smartphone, all the contacts in Add-on Numbers will be available for use.

Yes, they will be affected. Data connection is required for SMS/MMS of Add-on Numbers.
If you are using mobile number as your Add-on number, you can still dial in and out without data connection.
If you are using fixed-line number as your Add-on number, you cannot dial in or out without data connection.
(Please note that MMS only supports on mobile numbers under Add-on Numbers.)

To back up your SMS in Add-on Numbers, simply select the respective add-on number in the app and tap “Settings” on the top right-hand corner, then tap “Back up SMS”. A back up copy of the SMS will be sent to your designated email.

Yes, add-on numbers can be used for the registration of social media apps, including WhatsApp, LINE and WeChat.
Please be reminded that some apps may only accept a mobile number for registration, depending on the registration requirements of individual app.

All media files will be kept in device, please update the file path to retrieve media from File Manager of device anytime. Follow the steps below to retrieve the files
(Please note that MMS only supports on mobile numbers under Add-on Numbers.)

Yes. All users can enjoy significant savings by using 1638 IDD to make IDD calls via Add-on Numbers, simply visit any of our stores to register. Each Add-on Number is required to register 1638 IDD separately if you need to make 1638 IDD call with a particular Add-on Number.
You can use 001 IDD and 1638 IDD to make IDD calls via Add-on Numbers.
Please click here for more details.

Yes. You can receive incoming calls from the mobile numbers under Add-on Numbers via roaming service, and from the fixed-line numbers when you have roaming data or Wi-Fi connection.

You can make outgoing calls via the mobile numbers under Add-on Numbers to Hong Kong by using the *131* PhoneHome service. Please click here for more details. When using fixed-line numbers, you can dial local number to call back to Hong Kong directly when you have roaming data or Wi-Fi connection.

Receiving SMS/MMS via Add-on Numbers when you are abroad is free of charge. Please just ensure that you have roaming data or Wi-Fi connection. However, sending SMS/MMS will incur messaging charges, please click here for more details.

Please refer to the detailed charge in T&C.