Method for controlling access to electronic documents using locks

The present disclosure relates to a telecommunication method for controlling data access to a telecommunication server, the telecommunication server being connected to at least one first client terminal via at least a digital cellular telecommunication network, wherein the telecommunication server and the first client terminal communicate via a stateless protocol within at least a first communication session, the first client terminal being a battery powered device, the telecommunication server comprising an electronic document, the electronic document having a plurality of input fields for entry of electronic data, wherein a first lock and a session ID are assigned to the electronic document, the session ID being indicative of the first communication session, wherein the first lock is released by the telecommunication server upon ending the first communication session, the telecommunication server comprising multiple applications for accessing the electronic document, the telecommunication server further comprising a session control unit, wherein in a first access mode the session control unit is adapted to control access by the multiple applications to the electronic document using the first lock and the session ID, the method comprising receiving by the telecommunication server a first request from a first user of the first client terminal for accessing the electronic document, the first request being indicative of a first user ID of the first user.