The annual Mobile World Congress brings together the biggest names in the telecoms industry and this year has reverted to its pre-pandemic format, with over 80,000 delegates expected in Barcelona. FRANCE 24's Leo McGuinn explains what the sector has in store to find a path back to profits. Also in this edition: some 11 days after saying they couldn't contact him, investment bank China Renaissance says its missing founder Bao Fan has been "cooperating" with Chinese authorities.