You may need to contact your customers, members, associates or organisations to UNSUBSCRIBE from the Do-Not-Disturb (DND) policy so they may be receiving SMS update from you. The procedure for each of the networks is provided below:
For MTN lines, text ALLOW to 2442.
For AIRTEL lines, text OUT to 2442.
For GLO lines, text CANCEL to 2442.
For ETISALAT lines, text START to 2442.
Note that MTN/AIRTEL Nigeria might have added your phone numbers on the DND list by default, to check the status of your phone number you may kindly text STATUS to 2442. Where further assistance is required, you may kindly contact your network provider(s).