The number of smartphones shipped worldwide overtook, for the first time, the number of feature phones shipped earlier this year.
About 216 million smartphones were shipped during the first quarter, compared to the 212.5 million "dumb" phones.
By the end of 2013, researchers at IDC expect smartphones to account for almost 53% of all mobile phone shipments worldwide.
The change is partly due to a increase in demand from emerging markets. IDC expects future growth to slow in the United States where smartphones surpassed feature phones last year.
A recent survey by Canaccord Genuity shows Samsung is outselling Apple in the U.S. smartphone market.