Upon activation, how soon can I use 1511CALLBACK service?

ZONE Telecom > Business > 1511CALLBACK

Once you have activated the 1511CALLBACK, you should receive an instant SMS reply from us that the 1511CALLBACK has been successfully activated. 

You only need to activate 1511 CALLBACK service once and all your calls using 1511 will be converted to 1511CALLBACK.

You may start calling using the following method:

- For local calls: Dial: 1511 + 65 + Telephone Number

- For overseas calls: Dial: 1511 + Country Code + Area Code + Telephone Number