Chinese device brand Coolpad showcased an LTE device at the CTIA Wireless 2013 event in the US this week, as it looks to maintain its momentum following “historic high” sales last year.

According to Engadget, the smartphone on show was the vendor’s Quattro II 4G, a successor to an earlier device which was made available by MetroPCS (pictured) – with the report stating that “roughly one million” of the first generation smartphones have been sold by the operator.

Quattro II 4G has a mid-tier feature set, with 4.5-inch display, 1.2GHz dual-core processor, and 5 megapixel camera. It is expected to be made available through regional, prepaid carriers, rather than the big four national players.

Earlier this year, China Wireless, the parent of Coolpad, said it was the number four supplier of 3G smartphones in China in 2012, and started offering LTE devices in the US in a “further expansion into overseas markets”. It also offers products in India and Taiwan.

During the year, it launched nine devices with dual core processors and two with quad core capabilities, as well as working with “tier-one chipset suppliers” to offer its LTE device in the US.

According to a Marbridge Daily report earlier this month, Coolpad has been selected as a supplier of 4G devices to China Mobile, alongside Samsung, Huawei and ZTE.

For the full year 2012, the company reported a net profit of HK$325 million ($42 million), up 20 per cent from HK$271 million in 2011, on revenue of HK$14.36 billion, almost doubled from HK$7.34 billion in 2011.

It noted that its gross profit margin had dropped by 2.7 percentage points to 12 per cent during the year, mainly due to “intense price competition in the mid-range to low-end smartphones market”.