Global smartphone sales overall were down by 5.4% in Q4 of 2020 and 12.5% for the full year. Apple, however, bucked the trend with smartphone shipments growing by 3.3%. Samsung, the most recent leader, saw sales fall by 14.6%. Apple has 20.8% of the global smartphone market coming out of the fourth quarter. According to information and advisory firm Gartner Inc., Apple’s 5G iPhone 12 put the company over the top.
https://www.gartner.com/en/newsroom/press-releases/2021-02-22-4q20-smartphone-market-share-release