ReCall Service

http://www.safaricom.co.ke/index.php?id=162
Recall is a service which allows subscribers to be notified by means of an SMS of people who tried to call them while they were either busy, had their phone off or where out of coverage.

ReCall works in the same way as voicemail. The only difference between them is that Voicemail requires a subscriber to dial 111 to retrieve missed calls and messages left whereas ReCall delivers the messages via SMS and does not allow any further messages to be deposited by the calling party.

Subscribers receive notification about their missed calls by SMS