The new HTC U12+ is the first smartphone to feature dual cameras on both the front and back of the device.
The £699 device also features a six-inch display and a second-generation version of the company's Edge Sense technology, which enables users to touch and squeeze the edge of the device to take photos and navigate the phone.
HTC has struggled to keep up with market leaders Apple, Google, and Samsung in recent years and is now also under pressure from emerging Chinese manufacturers such as Huawei.
In January, Google also paid the firm more than one billion dollars to acquire HTC's smartphone design division, which included more than 2,000 engineers. The U12+ is the first device the company has released since that restructure.