A telecommunication method between an end terminal and a remote terminal, wherein the end terminal and the remote terminal are operable for communicating with each other via a cellular digital telecommunication network, wherein the end terminal comprises a display, an interface engine, and a battery for powering up the end terminal, wherein the end terminal is operable for switching into a power saving mode by disabling a functionality of displaying electronic documents using scrolling display functions on the display of the end terminal, the method comprising: downloading to the end terminal a machine-parsable electronic document from the remote terminal via the cellular digital telecommunication network, wherein a content of the machine-parsable electronic document comprises a plurality of computer processible input fields (181c, 182c, 183c, 184c) for entry of user data, a name for each of the computer processible input fields (181a, 182a, 183a, 184a) and an explanatory information for each of the computer processible input fields (181b, 182b, 183b, 184b); upon completion of download of the machine-parsable electronic document causing the interface engine to extract a list of the plurality of computer processible input fields and the names of the computer processible fields from the content of the machine-parsable electronic document; upon completion of download of the machine-parsable electronic document causing the end terminal to switch into a power saving mode by disabling the scrolling display functionality of the display of the end terminal; displaying the list of the plurality of the computer processible input fields and the names of the computer processible fields as an input menu on the display by the interface engine wherein the input menu comprises menu items (173, 174, 175, 176), wherein each computer processible input field and the corresponding name of the each computer processible input filed have a unique dedicated menu item; inputting the user data in the respective ones of the plurality of the computer processible input fields by using the input menu; sending the user data to the remote terminal by the end terminal via the cellular digital telecommunication network. downloading to the end terminal a machine-parsable electronic document from the remote terminal via the cellular digital telecommunication network, wherein a content of the machine-parsable electronic document comprises a plurality of computer processible input fields (181c, 182c, 183c, 184c) for entry of user data, a name for each of the computer processible input fields (181a, 182a, 183a, 184a) and an explanatory information for each of the computer processible input fields (181b, 182b, 183b, 184b); upon completion of download of the machine-parsable electronic document causing the interface engine to extract a list of the plurality of computer processible input fields and the names of the computer processible fields from the content of the machine-parsable electronic document; upon completion of download of the machine-parsable electronic document causing the end terminal to switch into a power saving mode by disabling the scrolling display functionality of the display of the end terminal; displaying the list of the plurality of the computer processible input fields and the names of the computer processible fields as an input menu on the display by the interface engine wherein the input menu comprises menu items (173, 174, 175, 176), wherein each computer processible input field and the corresponding name of the each computer processible input filed have a unique dedicated menu item; inputting the user data in the respective ones of the plurality of the computer processible input fields by using the input menu; sending the user data to the remote terminal by the end terminal via the cellular digital telecommunication network.