Barcelona - Chinese handset makers will lead an onslaught on smartphone titans Samsung and Apple when the world's biggest mobile fair opens on Monday in Barcelona, Spain. Apple, as usual, is steering clear of the 25-28 February congress that draws 1 500 exhibitors to this Mediterranean city in northeastern Spain, and Samsung is not expected to launch its next big offer, the Galaxy S4, until some time after the show. Behind Samsung and Apple, however, Chinese firms held the third, fourth and fifth spots - with 5.3% for Huawei, 4.7% for ZTE and 4.4% for Lenovo."They have had problems and everybody is hoping this will change because the duopoly is maybe not good for the market.""Otherwise, they will have problems."