Telecommunication System Comprising a Plurality of Portable Telephone Sets

A telecommunication system with

• a fixedly disposed central computer system operated by a provider;
• a network of distributed transmitter/receiver units connected to this computer system, and
• a number of wireless telephones, for instance of the GSM or UMTS type, which are in the possession of and are used by users, and comprise means for sending and receiving SMS and/or MMS messages to and from a selected user via the computer system,
• wherein
• the computer system comprises:
• a memory in which said messages can be stored and from which said messages can be retrieved and read in order to be fed to said network such that the relevant user can receive them;
• access means which can be controlled by a user by means of his/her mobile phone such that the relevant user gains access to the memory;
• and
• identification means which assign a personal code (PIN) to a user at the request of this user, and which send this code by SMS to the mobile phone of the relevant user, wherein the access means are released by this user sending an SMS with this code to a specifically allocated phone number, wherein
• (1) after sending an SMS with the assigned code for the first time, SMS and MMS messages addressed to the mobile phone of the relevant user are stored in the memory and are blocked from transmission via the network;
• and
• (2) by sending an SMS with the assigned code for the second and subsequent times, all messages stored in the memory are sent to the mobile phone of the relevant user and erased from the memory.