347.4 million units were shipped.
China-based OEMs, including Huawei, Oppo and Vivo drove the growth.
Samsung was the leader in Q1 unit shipments with 79.2 million smartphones shipped.
Apple was flat shipping 51.6 million units.
Huawei was No.1 in China growing 21.7% as shipments climbed from 28.1 million units last year, to 34.2 million units in the first quarter of 2017.
Oppo saw its shipments grow 29.8% on year to 25.6 million units in the first quarter. Strong shipments outside of China also helped Oppo’s numbers.
Vivo shipped 18.1 million units in the first quarter, increasing 23.6% from a year earlier.
Oppo and Vivo are brands both owned by BBK Electronics.