Zong has become the first operator to provide its customers with a facility to block promotional SMS, a unique service through which you will be able to restrict promotional SMS from the comfort of your homes and offices.
Usually, other companies block promotional messages by calling helpline or by visiting service centers.
How to Block Promotional Messages:
To block promotional SMS,
Visit this URL: http://203.82.55.30/websms/blocklist.aspx
Enter your number and you will receive a PIN Code
Enter that PIN code on the website to block all promotional SMS.
How to UnBlock Promotional Messages:
To unblock promotional SMS just enter your number and unblock the promotional SMS.

Zong Offers you to Block Promotional SMS