Patent ID: 8712454

Claim:
In a method of transmitting an electronic short message via at least one telecommunication network from a first terminal device for telecommunication to a group of receivers where the short message is received by a messaging center that sends this short message as single message to the all of the receivers of the group that are registered on the network, and the single messages, after having been received, are marked as unread on the receivers of the group that are registered on the network, the improvement comprising the steps of: allocating an identifier identifying the short message to each single message, generating with one of the receivers, in the case of the single message being read, read confirmation with the identifier and transmitting it to the messaging center, thereafter transmitting via or by messaging center a status change message with the identifier to the other receivers of the group that are registered on the network, allocating the status change message to the single message on the basis of the identifier on the other receivers, marking the single message as read on the other receivers, and when there is registration of one of the receivers of the group into the telecommunication network after the single message has been read on another receiver, transmitting the single message and the status change message immediately after the registration to the one receiver registering on the network.