The sales of Xiaomi's new flagship smartphone, the Mi Note, are off to a solid start.

The 5.7-inch smartphone, which is considered an iPhone 6 Plus competitor in China, sold out in three minutes after the first batch went on sale in China on Tuesday, Android Central reported, citing Xiaomi's Weibo account.

The total number of units sold has not been revealed, but a Xiaomi VP said on Monday that there were 220 million reservations for the device. The next batch of the smartphone will be available in China on Feb. 3.

The Mi Note, priced at ¥2,299 ($371), has a 1080p screen, a 2.5GHz quad-core processor, 3GB of RAM, a 13-megapixel camera (coupled with a 4-megapixel one at the front) and dual-SIM capability.

That's already on par with most high-end smartphones, but an even more powerful version — the Mi Note Pro — will debut in March, with a a quad HD screen, a 2GHz octa-core Snapdragon 810 processor, 4GB of RAM, and 64GB of storage.

Xiaomi is the largest smartphone maker in China. The company raised $1.1 billion at a staggering $45 billion valuation in December 2014, with investors that included All-Stars Investment, DST, GIC, Hopu Fund and Yunfeng Capital.