Patent ID: 8060059

Claim:
A computer readable non-transitory data storage medium comprising computer-program instructions executable by a processor, the computer-program instructions, when executed by the processor, for implementing steps comprising: filtering cellular telephone messages by: detecting an incoming cellular telephone message for delivery to a receiver; determining source identification information for the incoming cellular telephone message; comparing the source identification information for the incoming cellular telephone message with source identification entries in an acceptable senders list, the acceptable senders list comprising source identification information corresponding to previous incoming and outgoing voice contacts by the receiver, wherein the acceptable senders list is automatically determined by call records maintained by a cellular telephone service provider, and wherein the acceptable senders list is automatically updated upon receiving notification of an incoming or outgoing voice contact by the receiver; and if the source identification information for the incoming cellular telephone message is not found when comparing the source identification entries in the acceptable senders list, deleting the cellular telephone message from a memory to prevent delivery of the cellular telephone message to the receiver.