Apple’s mobile phone sales have dropped by about 15% over the past year, according to new research by comScore.
The company’s iPhone 6 and 6 Plus were the first two phones to fall off the charts, but the iPhone 7 and 7 Plus have seen the biggest drops.
The iPhone 7 Plus has been the most popular model since last year.
Apple sold 1.4 million iPhones in the first quarter of this year, down from 2.4, according the company.
Its biggest weakness is the iPhone 6, which dropped 13% last quarter.
Its loss is due to falling sales of the iPhone 5S, which sold more than 20 million units in the quarter.iPhone sales are forecast to drop another 1.5% to 1.8 million units by the end of the quarter, according comScore, with the rest of the companies expected to continue the same pace.
Apple has been struggling to maintain the momentum it was building for the iPhone with lower sales of new iPhones and other devices.