Research firm IDC said worldwide smartphone sales will likely increase just 3.1 per cent to 1.48 billion units, after 10.5 per cent growth last year.
IDC said it expects "low single digit growth" in the United States, Western Europe, and China while Japan and Canada are expected to contract by 6.4 percent and 6.9 percent, respectively.
The slowdown comes with the large markets generally saturated, and consumers keeping their handsets longer, because they are paying the full price without a subsidy from carriers.
This means that instead of getting devices from carriers, consumers are going directly to manufacturers or buying in online marketplaces.
More From This Section
"Consumers are having more say over which brands they want and at the same time able to bargain shop," Reith said.
IDC said Android's global dominance is likely to continue this year, with the Google-powered operating system in 84 per cent of smartphones sold in 2016, up from 81 per cent a year ago.
Apple is likely to see its first sales decline ever for the iPhone in 2016 -- a two per cent drop to 227 million units, IDC predicted.
IDC said the Windows Phone platform will see further declines as Microsoft shifts its focus. The report said Windows will account for just 0.8 per cent of the market this year.