Yes you can use existing mobile or fixed-line number from another operator as an add-on number. Please visit our stores to complete the registration. Prior to your visit:

- Please bring along your identity documents and address proof (within the last three months) for validation purpose and;

- Check the contract end date and contract terms of your existing mobile or fixed-line numbers.

You will need to download and install Add-on 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 fixed-line numbers.

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, within a few seconds 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 not be affected. If you do not want to forward the add-on numbers, simply turn on “Send Directly to Voicemail” and incoming calls to your add-on numbers will be directed to their respective voicemails.

Yes. Your 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 side, then switch off “Show My Caller ID”.

If your phone has been turned off, all incoming 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 require data connection.

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

Please note that once an add-on number is deleted, all contacts for that add-on number will also be deleted automatically. Therefore, please back up any related information before deleting the number.

No, you can’t. If you delete an add-on 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 side, 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.

No. All deleted add-on numbers cannot be restored.

This service can be used on smartphones running iOS 11.0 or above, and Android™ 5.0 or above. For Android™ smartphone which does not support Google Play services, the Value-Added Service will not be applicable on the smartphone.

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.

To add a contact from the native phonebook to your Add-on Numbers’ phonebook, please do the following:

Yes, as long as the main number for the service has not changed, simply download Add-on Numbers app to 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. Each fixed-line number under Add-on Numbers comes with its own SMS feature.

Yes, they will be affected. Data connection is required for SMS/MMS of 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 side, 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 file will be kept in device, please update the file path so you can retrieve media from File Manager of device anytime, please follow the below steps for retrieve file

• Open File Manager on your device
• Open Internal Storage, then select AON folder, choose Chatroom, “1” folder
• Select the file that you want to restore in AON app, then copy and move to a new folder: Internal storage/Documents/AON/ChatRoom/1/

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 data 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 call back to Hong Kong directly when you have data connection.

It is free to receive SMS/MMS via Add-on Numbers when you are abroad. Please just ensure that you have data connection. However, sending SMS/MMS will incur messaging charges, please click here for more details.