How do I sign up for 1511BLACKLIST service?

ZONE Telecom > Business > 1511BLACKLIST Service
If you wish to subscribe for this service, please send us your request via email at customercare@zonetel.com.sg and we will send you a 1511BLACKLIST Service Form for your completion.  Once we have received your request, we will set up the account and advise you accordingly via email. 
 
However, if you are not our member yet, please register first using the following simple steps: 
1.    Visit our homepage at: http://www.zonetel.com.sg and click on the "Sign Up" button.
2.    Select Business
3.    Follow the on-screen instructions to register in 4 easy steps.