The End Of Call Notification service (EOCN) gives subscribers
the opportunity to get a message upon the completion of a call, Sending text messages
and others etc. MTN has changed its command format for the End Of Call
Notification service (EOCN) by removing the space between the key words.
Checkout the updated End Of Activity Notification (EOCN) code
Before now, what we had before was:
Opt-In: EOCN ON to 131.
Opt-Out: EOCN OFF to 131
And what is now applicable is:
to 131.

Opt-Out: EOCNOFF to 131
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