HI-TECH ''super loos'' may find their way from Paris to Hongkong's MTR stations. While portable phones can already be widely used in the Mass Transit Railway, the company is investigating ways for passengers to answer calls of nature. A feasibility study on toilets in the MTR is being carried out and a solution may be the modern and hygienic facilities in France. MTR deputy operations director Roger Kynaston said: ''In some parts of France, there are toilets which do everything for you. ''We are looking at the technology,'' he said. The state-of-the-art French toilet generously gives the user 20 minutes before flushing. The MTR had examined having toilets before, but their tendency to become crime spots and that MTR passengers on average spend only 15 minutes in the system did not favour the idea. Hygiene concerns and drainage for underground toilets also pose problems. Will Dr ''Toilet'' Ronald Leung Ding-bong of the Urban Council be consulted? ''He has access to the technology,'' Mr Kynaston said. The promise to re-examine the toilet issue is contained in an MTR booklet published yesterday which pledges other improvements, including seats on platforms and post boxes at stations. Passengers are also to be treated to poems inside trains to create a more relaxing atmosphere. More reliable magnet-proof stored value tickets will be introduced in October, and new technologies are being sought to solve the smell problem at Prince Edward station. The MTR insists the toilet study is still at a preliminary stage, and the first trial toilet may not be installed in until the end of next year. In the meantime, follow the signs on the street maps on the MTR concourse to the nearest public conveniences. But if you are in a real hurry, the doors of the MTR staff toilets will be opened.