I found this in my mailbox today. So basically if you don't want Smartone to spam you, you need to write them a letter or go to one of their offices to stop them!!
Dear Ms XXX,
To keep you informed of notices and updates relating to servicing your contract(s), latest offers and promotions on our services and products, together with services and products from our business partners (including travel, dining, entertainment, apparel, health & beauty, education, household, transportation, banking, insurance and other consumer products and services), we will continue to deliver this information to you as usual using your contact details such as your name, email address, correspondence address, telephone number and mobile phone number. For full details of our updated privacy policy, please click here.
As we seek to look after you as we’d wish to be looked after ourselves, we will only send you notices and selected offers that have been screened as appropriate for you. If you would like to stop receiving this information, please write to our Data Protection Officer, identifying yourself with your name and contact number. You can also write to re-start receiving correspondence if you have unsubscribed from it previously.
The Data Protection Officer can be contacted at:
SmarTone Mobile Communications Limited,
PO Box 68864,
Kowloon East Post Office,
Kowloon
Yours sincerely,
SmarTone Mobile Communications Limited