Embattled Chinese tech giant Huawei said Wednesday its first-quarter revenue fell 16.5 percent, hurt by a dip in smartphone sales. Sales declined 16.5 percent from a year earlier to 152.2 billion yuan ($23.5 billion) due in part to lower revenue for its consumer unit, the company said. It gave no earnings but said its profit margin improved by 3.8 percentage points to 11.1 percent. Huawei’s phone shipments to retailers and other sellers within China plunge by half in the first quarter. The company shipped a total of 14.9 million handsets within China in the quarter ending in March, down from 30.1 million in the same period last year, according to research firm Canalys. Its market share also dropped to 16 percent from 41 percent a year ago, becoming the third largest after fellow Chinese brands Vivo and Oppo. Huawei was put on a blacklist by former U.S. President Donald Trump in …