LG has released official press images of its LG G3 smartphone ahead of its launch next month, Digital Spy reported.

The images show the device sporting a smart accessory dubbed the QuickCircle Case, which will be available in shine gold, aqua mint, Indian pink, metallic black and silk white.

The QuickCircle Case comes with a range of features, including smart lighting to alert users about notifications and support for Qi-compatible wireless charging through the cover itself.

"The smartphone ecosystem is constantly evolving - no longer are cases just for protection from the elements and bumps and drops," said Dr Jong-seok Park, president and CEO of the LG's mobile division.

"They're the perfect accessory to build in extra features that add more value to a mobile device. With QuickCircle Case, we've exceeded the baseline by making it customisable to better fit users' needs."

The LG G3, which is expected to feature a 5.5-inch QHD 2560 x 1440 display, Qualcomm Snapdragon 801 chipset and 3GB of RAM, will be unveiled on May 27.