According to Counterpoint Research, while the growth will be slow during the initial commercialisation phase in 2019, there will be an uptick in sales once countries shift from non-standalone to standalone 5G infrastructure.
"We also expect 5G chips to have a higher price point which will initially drive the cost of devices up. 5G capable devices will be premium only in the beginning. Also only a handful of countries will be deploying the first 5G infrastructure," Research Director Tom Kang said in a statement.
The US, Korea, China and Japan will be key markets for 5G infrastructure development and growth of smartphone sales.
"We are seeing some great initial developments happening in the US, South Korea, China, and Japan and expect growth to be concentrated in these countries due to their big roll-out plans for 5G starting in 2019," said Research Analyst Maurice Klaehne.
Other countries, especially in Europe, are more likely to leapfrog to standalone 5G as they will want to wait for concrete business cases to arise, before fully committing to the transition.
The overall handset market will slow to a CAGR of 1-2 percent from 2018-2021 due to market saturation and product innovations that are not spurring growth.
"5G devices will begin gaining in share in the market, but overall transition to 5G could be slow and steady. Once we establish better 5G business cases and infrastructure, the market will begin seeing higher sales overall," noted Research Director Peter Richardson.