CIs an Arlesian smartphone world: the foldable phone. This Wednesday, Samsung, the giant of the sector, must announce what must be the big innovation of the smartphone. It is certainly far from the device as thin as a sheet of paper that can be folded and wrapped at will. But the big players of the smartphone have all announced the arrival of their first collapsible phones for 2019. If Samsung was roasted priority by the Chinese Royole, who will market the first foldable tablet in December, the Korean company has a card to play tonight in San Francisco during its developer conference.