More than 40% of all calling attempts are missed every day. Mobile subscribers cannot receive calls while they are out of coverage, if their phone is switched off, or when they are busy on other call. These are all loss of important calls for both the calling and called parties, as well as a significant loss of revenue for telecom operators. TrueTel MCA addresses the above problems with a comprehensive host of features, enabling the called person to always know who tried to call, and ensuring that revenue loss to the telecom operator is minimized. Mobile users are notified by pre-configured SMS about their missed calls, and subsequently informed about the availability of the subscriber to the caller, thereby encouraging them to make return calls.