Patent ID: 8442562

Claim:
A method that acknowledges a receiving cell phone's receipt of SMS messages from a sending cell phone, comprising: receiving a short message service (SMS) message at the receiving cell phone from the sending cell phone; in response to receiving said SMS message, the receiving cell phone automatically initiating a missed call that is configured to provide acknowledgement of the receiving cell phone's receipt of said SMS message, wherein said automatically initiating a missed call comprises initiating a call to the sending cell phone by sending a ring back from receiving cell phone to the sending cell phone and terminating the call before being answered at the sending cell phone; the call from the receiving phone to the sending cell phone configured to cause the sending cell phone, in response to receiving the ring back within a predetermined amount of time, to refrain from resending the SMS message; wherein the act of initiating a missed call is performed by the receiving phone dependent on a particular geographical location detected using the receiving cell phone's GPS function.