LG has outed its upcoming G3 handset in a promotional video intended to showcase its 'QuickCircle' functionality. The official image corroborates a slew of recent G3 leaks.

The promotional video reveals several G3 features can be accessed while the case remains closed, such as the front camera and music player. The QuickCase display is circular and the applications displayed resemble the theme of Android Wear.

Only the facade of the LG G3 is on display, but the quick glimpse is enough to corroborate a long string of leaks. Popular tipster Evleaks posted supposed press renders of the LG G3 which are identical to the G3 featured in LG's promotional video.

A leak published by GSMArena reveals the specifications of the smartphone. Standing out from the list is a 5.5in, 2560x1440 resolution screen that will give the G3 an unparalleled 534 pixel-per-inch density. For the sake of comparison, Apple's 'retina' display maxes at 326 pixels-per-inch.

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The G3 will have a Snapdragon 801 chipset, a 4G modem, 3GB of RAM and 32GB of internal storage. Missing from the leak are details on the CPU and whether or not the G3 supports expandable memory.

The leaked presentation slides reveal the G3 will be 8.9mm thick and 146mm tall, which will make it as tall as HTC's One, even though the smartphone will have 0.5in larger screen.

LG will officially launch the G3 on 27 May at a launch event held in London.

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