Can I use 1511CALLBACK service when I am overseas?

ZONE Telecom > Business > 1511CALLBACK
1511CALLBACK service is suitable when you are calling from Singapore. However if you wish to ultilise the callback service when you are overseas, you may consider our ZONE1511 GlobalDial or GlobalDial Plus Service, which will help you cut down on your roaming charges.
 
Kindly login to your account via http://www.zonetel.com.sg and click on List Accounts under ZONE GlobalDial. Alternatively, you may contact our Corporate Helpdesk at 67206726 / 6720 6727 or email us at customercare@zonetel.com.sg for more information.