Procedure and device to allow response messages to incoming phone calls

Procedure for using a computer device (110), comprising: receiving an incoming communication (112) from another computer device (120) to initiate a voice exchange session; in response to the reception of the incoming communication, the determination of a message identifier of the other computing device, in which the message identifier is determined based at least in part on data provided with the incoming communication; checking that a device of the other computing device has the ability to receive a message (122) and: if the device of the other computing device has the ability to receive the message, offering a reply message option comprising : the response to the reception of the incoming communication generating, using the content created previously and without answering the incoming communication, the message to a user of the other computing device; and the automatic routing and transmission of the message to the other computing device using the message identifier determined from the incoming communication.